s = input()
for i in s:
    if i.isupper():
        if i !='Z':
            n = ord(i.lower())+1
            i = chr(n)
            print(i,end='')
        else:
            print('a',end='')
    elif i.islower():
        if i in 'abc':
            print(2, end='')
        if i in 'def':
            print(3, end='')
        if i in 'ghi':
            print(4, end='')
        if i in 'jkl':
            print(5, end='')
        if i in 'mno':
            print(6, end='')
        if i in 'pqrs':
            print(7, end='')
        if i in 'tuv':
            print(8, end='')
        if i in 'wxyz':
            print(9, end='')
    else:
        print(i, end='')

循环判断