"""
N = list(map(int,input().split()))
S = [str(input()) for _ in range(N)]
S = [list(map(int,list(input()))) for _ in range(h)] 
print(*S,sep="")
"""

import sys
sys.setrecursionlimit(10**6)
input = lambda: sys.stdin.readline().rstrip()
inf = float("inf") # 無限

s = len(input())
print("x"*s) """
N = list(map(int,input().split()))
S = [str(input()) for _ in range(N)]
S = [list(map(int,list(input()))) for _ in range(h)] 
print(*S,sep="")
""" import sys sys sys.setrecursionlimit(10**6) sys.setrecursionlimit sys setrecursionlimit 10**6 10 6 input = lambda: sys.stdin.readline().rstrip() input lambda: sys.stdin.readline().rstrip() sys.stdin.readline().rstrip() sys.stdin.readline().rstrip sys.stdin.readline() sys.stdin.readline sys.stdin sys stdin readline rstrip inf = float("inf") inf float("inf") float "inf" s = len(input()) s len(input()) len input() input print("x"*s) print "x"*s "x" s inf = float("inf") float("inf") inf input = lambda: sys.stdin.readline().rstrip() lambda: sys.stdin.readline().rstrip() input s = len(input()) len(input()) s
"""
N = list(map(int,input().split()))
S = [str(input()) for _ in range(N)]
S = [list(map(int,list(input()))) for _ in range(h)] 
print(*S,sep="")
"""

import sys
sys.setrecursionlimit(10**6)
input = lambda: sys.stdin.readline().rstrip()
inf = float("inf") # 無限

s = len(input())
print("x"*s)