import string

letters=string.ascii_lowercase

c=eval(input())

print((letters[letters.index(c)+1]))
print((chr(ord(eval(input()))+1)))
import string

letters = string.ascii_lowercase
c = eval(input())
print((letters[letters.index(c) + 1]))

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

-import string - -letters = string.ascii_lowercase -c = eval(input()) -print((letters[letters.index(c) + 1])) +print((chr(ord(eval(input())) + 1)))