C = eval(input())

ans = chr(ord(C)+1)

print(ans)

c = eval(input())

print((chr(ord(c)+1)))

C = eval(input())
ans = chr(ord(C) + 1)
print(ans)

c = eval(input())
print((chr(ord(c) + 1)))

-C = eval(input()) -ans = chr(ord(C) + 1) -print(ans) +c = eval(input()) +print((chr(ord(c) + 1)))