AtCoder Inc. holds a contest every Saturday.
There are two types of contests called ABC and ARC, and just one of them is held at a time.
The company holds these two types of contests alternately: an ARC follows an ABC and vice versa.
Given a string S representing the type of the contest held last week, print the string representing the type of the contest held this week.

-----Constraints-----
 - S is ABC or ARC.

-----Input-----
Input is given from Standard Input in the following format:
S

-----Output-----
Print the string representing the type of the contest held this week.

-----Sample Input-----
ABC

-----Sample Output-----
ARC

They held an ABC last week, so they will hold an ARC this week.
[{"code": "s = input()\nif s == 'ABC':\n    print('ARC')\nelse:\n    print('ABC')", "passed": true, "time": 0.19, "memory": 14044.0, "status": "done"}, {"code": "S=input()\nif S==\"ARC\":\n    print(\"ABC\")\nelse:\n    print(\"ARC\")\n", "passed": true, "time": 0.14, "memory": 14148.0, "status": "done"}, {"code": "s = input()\n\nif s == \"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")\n", "passed": true, "time": 0.37, "memory": 14180.0, "status": "done"}, {"code": "s = input()\nif s == 'ABC':\n    print('ARC')\nelse:\n    print('ABC')\n", "passed": true, "time": 1.67, "memory": 14080.0, "status": "done"}, {"code": "S=input()\nif S[1]=='B':\n    print(\"ARC\")\nelse:\n    print(\"ABC\")", "passed": true, "time": 0.15, "memory": 14052.0, "status": "done"}, {"code": "s=input()\nif s=='ABC':\n  print('ARC')\nelse:\n  print('ABC')", "passed": true, "time": 0.22, "memory": 14068.0, "status": "done"}, {"code": "s = input()\n\nif s == \"ABC\" :\n    print(\"ARC\")\n\nelif s == \"ARC\" :\n    print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14272.0, "status": "done"}, {"code": "s = input()\n\nif s == \"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")", "passed": true, "time": 0.15, "memory": 14140.0, "status": "done"}, {"code": "S = input()\nif(S == \"ABC\"):print(\"ARC\")\nelse:print(\"ABC\")   ", "passed": true, "time": 0.34, "memory": 14132.0, "status": "done"}, {"code": "s = input()\n\nif s == 'ABC':\n    print('ARC')\nelse:\n    print('ABC')\n", "passed": true, "time": 0.14, "memory": 14028.0, "status": "done"}, {"code": "x = input()\nif x[1] == 'B':\n  print(\"ARC\")\nelse:\n  print(\"ABC\")", "passed": true, "time": 0.15, "memory": 14288.0, "status": "done"}, {"code": "s=input()\nif s==\"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")\n", "passed": true, "time": 0.14, "memory": 14136.0, "status": "done"}, {"code": "s = input()\nif s == 'ABC':\n  print('ARC')\nelse:\n  print('ABC')", "passed": true, "time": 0.21, "memory": 14228.0, "status": "done"}, {"code": "# coding: utf-8\n# Your code here!\nS = input()\n\nif S == \"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")", "passed": true, "time": 0.16, "memory": 14172.0, "status": "done"}, {"code": "a = input()\n\nif a == \"S\" :\n    print(\"\u4eca\u9031\u958b\u50ac\u3055\u308c\u308b\u30b3\u30f3\u30c6\u30b9\u30c8\u3092\u8868\u3059\u6587\u5b57\u5217\u3092\u51fa\u529b\u305b\u3088\u3002\")\nelif a == \"ABC\":\n    print(\"ARC\")\nelse :\n    print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14248.0, "status": "done"}, {"code": "S = input()\nif S == 'ABC':\n  print('ARC')\nelse:\n  print('ABC')", "passed": true, "time": 0.14, "memory": 14252.0, "status": "done"}, {"code": "s=input()\nif s==\"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14032.0, "status": "done"}, {"code": "s = input()\n\nif s == 'ABC':\n    print('ARC')\nelse:\n    print('ABC')\n", "passed": true, "time": 0.14, "memory": 14128.0, "status": "done"}, {"code": "s = input()\n\nif s == \"ABC\":\n  print(\"ARC\")\nelse:\n  print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14036.0, "status": "done"}, {"code": "S = input()\nif S[1] == \"R\":\n    print(\"ABC\")\nelse:\n    print(\"ARC\")", "passed": true, "time": 0.14, "memory": 14056.0, "status": "done"}, {"code": "S = input()\nif(S == \"ABC\"):\n    print(\"ARC\")\nelse:\n    print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14084.0, "status": "done"}, {"code": "s=input()\n\nif s==\"ABC\":\n  print(\"ARC\")\nelse:\n  print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14036.0, "status": "done"}, {"code": "print(\"ABC\" if input()==\"ARC\" else \"ARC\")", "passed": true, "time": 0.14, "memory": 14364.0, "status": "done"}, {"code": "s = input()\nprint(\"ABC\" if s == \"ARC\" else \"ARC\")", "passed": true, "time": 0.14, "memory": 14192.0, "status": "done"}, {"code": "s = str(input())\nif s==\"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14060.0, "status": "done"}, {"code": "S = str(input())\nif S == 'ABC':\n  print('ARC')\nelse:\n  print('ABC')", "passed": true, "time": 0.14, "memory": 14304.0, "status": "done"}, {"code": "s = input()\nprint(\"ABC\" if s == \"ARC\" else \"ARC\")", "passed": true, "time": 0.14, "memory": 14332.0, "status": "done"}, {"code": "print(f\"A{'RB'['R'in input()]}C\")", "passed": true, "time": 0.24, "memory": 14280.0, "status": "done"}, {"code": "print(\"ARC\" if input()[1]==\"B\" else \"ABC\")", "passed": true, "time": 0.15, "memory": 14184.0, "status": "done"}, {"code": "a=input()\nif a==\"ABC\":\n  \tprint(\"ARC\")\nelse:\n  print(\"ABC\")", "passed": true, "time": 0.24, "memory": 14068.0, "status": "done"}, {"code": "#!/usr/bin/env python3\ns  = input()\nif s == \"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")\n", "passed": true, "time": 0.14, "memory": 14028.0, "status": "done"}, {"code": "S=input()\n\nif S=='ABC':\n    print('ARC')\nelse:\n    print('ABC')\n", "passed": true, "time": 0.23, "memory": 14132.0, "status": "done"}, {"code": "print(input().translate(str.maketrans({\"R\":\"B\",\"B\":\"R\"})))", "passed": true, "time": 0.15, "memory": 14032.0, "status": "done"}, {"code": "S = input()\nif S == \"ABC\":\n  print(\"ARC\")\nelse:\n  print(\"ABC\")", "passed": true, "time": 0.15, "memory": 14032.0, "status": "done"}, {"code": "s = input()\nif s == \"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")", "passed": true, "time": 0.15, "memory": 14044.0, "status": "done"}, {"code": "s=input();print(\"ABC\"if s==\"ARC\"else\"ARC\")", "passed": true, "time": 0.5, "memory": 14128.0, "status": "done"}, {"code": "#!/usr/bin/env python\n# -*- coding: utf-8 -*-\n\nimport sys  # {{{\nimport os\nimport time\nimport re\nfrom pydoc import help\nimport string\nimport math\nfrom operator import itemgetter\nfrom collections import Counter\nfrom collections import deque\nfrom collections import defaultdict as dd\nimport fractions\nfrom heapq import heappop, heappush, heapify\nimport array\nfrom bisect import bisect_left, bisect_right, insort_left, insort_right\nfrom copy import deepcopy as dcopy\nimport itertools\n# }}}\n\n# pre-defined{{{\nsys.setrecursionlimit(10**7)\nINF = 10**20\nGOSA = 1.0 / 10**10\nMOD = 10**9+7\nALPHABETS = [chr(i) for i in range(ord('a'), ord('z')+1)]  # can also use string module\ndef LI(): return [int(x) for x in sys.stdin.readline().split()]\ndef LI_(): return [int(x)-1 for x in sys.stdin.readline().split()]\ndef LF(): return [float(x) for x in sys.stdin.readline().split()]\ndef LS(): return sys.stdin.readline().split()\ndef I(): return int(sys.stdin.readline())\ndef F(): return float(sys.stdin.readline())\ndef DP(N, M, first): return [[first] * M for n in range(N)]\ndef DP3(N, M, L, first): return [[[first] * L for n in range(M)] for _ in range(N)]\nfrom inspect import currentframe\n# }}}\n\ndef solve():\n    s = input()\n    if s == \"ABC\":\n        print(\"ARC\")\n    else:\n        print(\"ABC\")\n\n    return 0\n\ndef __starting_point():# {{{\n    solve()\n\n# vim: set foldmethod=marker: }}}\n\n__starting_point()", "passed": true, "time": 0.27, "memory": 18480.0, "status": "done"}, {"code": "print('ARC' if input()!='ARC' else 'ABC')", "passed": true, "time": 0.14, "memory": 14252.0, "status": "done"}, {"code": "#!/usr/bin/env python3\ns  = input()\nif s == \"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")\n", "passed": true, "time": 0.14, "memory": 14276.0, "status": "done"}, {"code": "s=input()\n\nif s.find('B')==1:\n  print('ARC')\nelse:\n  print('ABC')", "passed": true, "time": 0.14, "memory": 14184.0, "status": "done"}, {"code": "S = input()\nprint('ABC' if S == 'ARC' else 'ARC')", "passed": true, "time": 0.14, "memory": 14108.0, "status": "done"}, {"code": "#!/usr/bin/env python\n# -*- coding: utf-8 -*-\n\nimport sys  # {{{\nimport os\nimport time\nimport re\nfrom pydoc import help\nimport string\nimport math\nfrom operator import itemgetter\nfrom collections import Counter\nfrom collections import deque\nfrom collections import defaultdict as dd\nimport fractions\nfrom heapq import heappop, heappush, heapify\nimport array\nfrom bisect import bisect_left, bisect_right, insort_left, insort_right\nfrom copy import deepcopy as dcopy\nimport itertools\n# }}}\n\n# pre-defined{{{\nsys.setrecursionlimit(10**7)\nINF = 10**20\nGOSA = 1.0 / 10**10\nMOD = 10**9+7\nALPHABETS = [chr(i) for i in range(ord('a'), ord('z')+1)]  # can also use string module\ndef LI(): return [int(x) for x in sys.stdin.readline().split()]\ndef LI_(): return [int(x)-1 for x in sys.stdin.readline().split()]\ndef LF(): return [float(x) for x in sys.stdin.readline().split()]\ndef LS(): return sys.stdin.readline().split()\ndef I(): return int(sys.stdin.readline())\ndef F(): return float(sys.stdin.readline())\ndef DP(N, M, first): return [[first] * M for n in range(N)]\ndef DP3(N, M, L, first): return [[[first] * L for n in range(M)] for _ in range(N)]\nfrom inspect import currentframe\n# }}}\n\ndef solve():\n    s = input()\n    if s == \"ABC\":\n        print(\"ARC\")\n    else:\n        print(\"ABC\")\n\n    return 0\n\ndef __starting_point():# {{{\n    solve()\n\n# vim: set foldmethod=marker: }}}\n\n__starting_point()", "passed": true, "time": 0.26, "memory": 18652.0, "status": "done"}, {"code": "S=input()\nif S == \"ABC\":print(\"ARC\")\nelse : print(\"ABC\")", "passed": true, "time": 0.15, "memory": 14276.0, "status": "done"}, {"code": "s = input()\nif s == 'ABC':\n    print('ARC')\nelse:\n    print('ABC')", "passed": true, "time": 0.15, "memory": 14028.0, "status": "done"}, {"code": "S = input()\n\nif S == 'ABC':\n    print('ARC')\nelse:\n    print('ABC')", "passed": true, "time": 0.15, "memory": 14080.0, "status": "done"}, {"code": "a = input()\nif a =='ABC':\n    print('ARC')\nelse:\n    print('ABC')", "passed": true, "time": 0.14, "memory": 14184.0, "status": "done"}, {"code": "S = input()\n\nprint('ABC') if S == 'ARC' else print('ARC')\n", "passed": true, "time": 0.14, "memory": 14176.0, "status": "done"}, {"code": "S = input()\nprint('ARC' if S == 'ABC' else 'ABC')", "passed": true, "time": 0.14, "memory": 14100.0, "status": "done"}, {"code": "S = input()\n\nif S == \"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")\n\n", "passed": true, "time": 0.16, "memory": 14040.0, "status": "done"}, {"code": "s = input()\nif s == 'ARC':\n  print('ABC')\nelse:\n  print('ARC')", "passed": true, "time": 0.14, "memory": 14240.0, "status": "done"}, {"code": "s = input()\nif s == 'ARC':\n  print('ABC')\nelse:\n  print('ARC')", "passed": true, "time": 0.15, "memory": 14028.0, "status": "done"}, {"code": "word = input()\nif word == \"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14244.0, "status": "done"}, {"code": "S = input()\nif S == 'ABC':\n    print('ARC')\n    return\nelse:\n    print('ABC')\n    return", "passed": true, "time": 0.14, "memory": 14264.0, "status": "done"}, {"code": "n = input()\n\nif n == 'ABC':\n    print('ARC')\n\nif n == 'ARC':\n    print('ABC')\n", "passed": true, "time": 0.15, "memory": 14084.0, "status": "done"}, {"code": "s = input()\nif s == 'ABC':\n    print('ARC')\nelse:\n    print('ABC')\n", "passed": true, "time": 0.14, "memory": 14024.0, "status": "done"}, {"code": "S = input();print('ARC') if S=='ABC' else print('ABC')", "passed": true, "time": 0.14, "memory": 14032.0, "status": "done"}, {"code": "S=input()\nif S==\"ABC\":\n    print(\"ARC\")\nelse:print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14136.0, "status": "done"}, {"code": "s = input()\n\nif s == \"ARC\":\n    print(\"ABC\")\nelse:\n    print(\"ARC\")", "passed": true, "time": 0.14, "memory": 14036.0, "status": "done"}, {"code": "def inN():\n    return int(input())\ndef inL():\n    return list(map(int,input().split()))\ndef inNL(n):\n    return [list(map(int,input().split())) for i in range(n)]\nmod = pow(10,9)+7\n#import numpy\ns = input()\nif s == \"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")", "passed": true, "time": 0.54, "memory": 14200.0, "status": "done"}, {"code": "s = input()\n\nif s == 'ABC':\n    print('ARC')\nelse:\n    print('ABC')\n", "passed": true, "time": 0.14, "memory": 14032.0, "status": "done"}, {"code": "s = input()\nif(s == 'ABC'):\n    print('ARC')\nelse:\n    print(\"ABC\")    \n", "passed": true, "time": 0.14, "memory": 14236.0, "status": "done"}, {"code": "s = input()\n\nif s == \"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")", "passed": true, "time": 0.32, "memory": 14076.0, "status": "done"}, {"code": "s = input()\nif s == 'ABC':\n    print('ARC')\nelse:\n    print('ABC')\n", "passed": true, "time": 0.14, "memory": 14284.0, "status": "done"}, {"code": "print(\"A%sC\"%'BR'[input()<\"AR\"])", "passed": true, "time": 0.14, "memory": 14304.0, "status": "done"}, {"code": "S=input()\nif S=='ABC':\n    print('ARC')\nelse:\n    print('ABC')", "passed": true, "time": 0.39, "memory": 14280.0, "status": "done"}, {"code": "s=input()\n\nif s.find('B')==1:\n  print('ARC')\nelse:\n  print('ABC')", "passed": true, "time": 0.15, "memory": 14108.0, "status": "done"}, {"code": "s = input()\n\nif s == 'ARC':\n    print('ABC')\nelse:\n    print('ARC')\n", "passed": true, "time": 0.14, "memory": 14040.0, "status": "done"}, {"code": "S = input()\nif S == 'ABC':\n  print('ARC')\nelse:\n  print('ABC')\n", "passed": true, "time": 0.26, "memory": 14252.0, "status": "done"}, {"code": "s = input()\n\nif s == \"ABC\":\n  print(\"ARC\")\nelse:\n  print(\"ABC\")", "passed": true, "time": 0.16, "memory": 14188.0, "status": "done"}, {"code": "S = input()\n\nif S == \"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14032.0, "status": "done"}, {"code": "S = str(input())\nif S == 'ABC':\n  print('ARC')\nelse:\n  print('ABC')", "passed": true, "time": 0.14, "memory": 14072.0, "status": "done"}, {"code": "print({\"ABC\":\"ARC\",\"ARC\":\"ABC\"}[input()])", "passed": true, "time": 0.14, "memory": 14052.0, "status": "done"}, {"code": "s = input()\n\nif (s==\"ABC\"):\n    print(\"ARC\")\nelse:\n    print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14212.0, "status": "done"}, {"code": "s = input()\nif s == 'ABC':\n    print('ARC')\nelif s == 'ARC':\n    print('ABC')", "passed": true, "time": 0.14, "memory": 14240.0, "status": "done"}, {"code": "def main() -> None:\n    s = input()\n\n    print(('ARC' if s == 'ABC' else 'ABC'))\n    return\n\n\ndef __starting_point():\n    main()\n\n__starting_point()", "passed": true, "time": 0.14, "memory": 14072.0, "status": "done"}, {"code": "s = list(input())\n\nif s[1] == 'B':\n    print('ARC')\nelse:\n    print('ABC')", "passed": true, "time": 0.14, "memory": 14160.0, "status": "done"}, {"code": "s = input()\n\nif s == 'ABC':\n    print('ARC')\n    \nelse :\n    print('ABC')", "passed": true, "time": 0.14, "memory": 14272.0, "status": "done"}, {"code": "s = input()\nprint(\"ABC\" if s == \"ARC\" else \"ARC\")", "passed": true, "time": 0.14, "memory": 14224.0, "status": "done"}, {"code": "S = input()\nprint(\"ARC\") if S==\"ABC\" else print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14256.0, "status": "done"}, {"code": "S=input()\nif S=='ABC':\n  print('ARC')\nelse:\n  print('ABC')\n", "passed": true, "time": 0.14, "memory": 14180.0, "status": "done"}, {"code": "print(['ARC','ABC'][input()[1]=='R'])", "passed": true, "time": 0.14, "memory": 14220.0, "status": "done"}, {"code": "S = input()\nif S == 'ABC':\n    print('ARC')\nelse:\n    print('ABC')   ", "passed": true, "time": 0.15, "memory": 14024.0, "status": "done"}, {"code": "#ABC166\nS = input()\n#----------\u4ee5\u4e0a\u5165\u529b----------\nif S == 'ABC':\n    print('ARC')\nelse:\n    print('ABC')", "passed": true, "time": 0.14, "memory": 14172.0, "status": "done"}, {"code": "print(('ABC' if input()[1] == 'R' else 'ARC'))\n", "passed": true, "time": 0.14, "memory": 14224.0, "status": "done"}, {"code": "S = input()\n\nif S == \"ABC\":\n    print(\"ARC\")\n\nelse:\n    print(\"ABC\")\n", "passed": true, "time": 0.14, "memory": 14260.0, "status": "done"}, {"code": "s=input()\nprint('ARC') if s=='ABC' else print('ABC')", "passed": true, "time": 0.14, "memory": 14032.0, "status": "done"}, {"code": "def __starting_point():\n\n    s = input()\n    if s == \"ARC\":\n        print(\"ABC\")\n    else:\n        print(\"ARC\")\n\n__starting_point()", "passed": true, "time": 0.14, "memory": 14208.0, "status": "done"}, {"code": "s = input()\nif s == 'ABC' :\n    print('ARC')\nelse :\n    print('ABC')", "passed": true, "time": 0.14, "memory": 14272.0, "status": "done"}, {"code": "s=input()\nif s==\"ABC\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14036.0, "status": "done"}, {"code": "s = input()\n\nif s[1] == \"B\":\n    print(\"ARC\")\nelse:\n    print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14228.0, "status": "done"}, {"code": "S=input()\nif S=='ABC':\n    print('ARC')\nelse:\n    print('ABC')", "passed": true, "time": 0.14, "memory": 14280.0, "status": "done"}, {"code": "string = input()\n\nif string == \"ABC\":\n  print(\"ARC\")\nelse:\n  print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14140.0, "status": "done"}, {"code": "s=input()\n\nif s.find('B')==1:\n  print('ARC')\nelse:\n  print('ABC')", "passed": true, "time": 0.14, "memory": 14212.0, "status": "done"}, {"code": "print(*({\"ABC\",\"ARC\"}-{input()}))", "passed": true, "time": 0.14, "memory": 14116.0, "status": "done"}, {"code": "print('ARC' if (input()=='ABC') else 'ABC')", "passed": true, "time": 0.14, "memory": 14092.0, "status": "done"}, {"code": "S = input()\nif S[1] == \"B\":\n  print(\"ARC\")\nelse:\n  print(\"ABC\")", "passed": true, "time": 0.14, "memory": 14092.0, "status": "done"}, {"code": "S = input()\nif S == \"ABC\":\n  print(\"ARC\")\nelse:\n  print(\"ABC\")", "passed": true, "time": 0.13, "memory": 14032.0, "status": "done"}, {"code": "S = input()\n\nprint('ABC') if S == 'ARC' else print('ARC')", "passed": true, "time": 0.14, "memory": 14240.0, "status": "done"}]