import re
s = input()
answer=re.sub(r'[a-z]','x',s)
print(answer) import re re s = input() s input() input answer=re.sub(r'[a-z]','x',s) answer re.sub(r'[a-z]','x',s) re.sub re sub r'[a-z]' 'x' s print(answer) print answer s = input() input() s answer=re.sub(r'[a-z]','x',s) re.sub(r'[a-z]','x',s) answer
import re
s = input()
answer=re.sub(r'[a-z]','x',s)
print(answer)