s=input('')
t=''
for a in s:
    t=t+'x'

print(t) s=input('') s input('') input '' t='' t '' for a in s:
    t=t+'x' a s t=t+'x' t t+'x' t 'x' print(t) print t s=input('') input('') s t=t+'x' t+'x' t t='' '' t
s=input('')
t=''
for a in s:
    t=t+'x'

print(t)