题解 | #字符串加解密#

s1 = list(input())
s2 = list(input())

def encryption(s, x):
    for i in range(len(s)):
        if s[i].isupper():
            if x == 1 and s[i] == 'Z':
                s[i] = 'a'
            elif x == -1 and s[i] == 'A':
                s[i] = 'z'
            else:
                s[i] = chr(ord(s[i]) + 32 + x)
        elif s[i].islower():
            if x == 1 and s[i] == 'z':
                s[i] = 'A'
            elif x == -1 and s[i] == 'a':
                s[i] = 'Z'
            else:
                s[i] = chr(ord(s[i]) - 32 + x)
        elif s[i].isdigit():
            if x == 1 and s[i] == '9':
                s[i] = '0'
            elif x == -1 and s[i] == '0':
                s[i] = '9'
            else:
                s[i] = chr(ord(s[i]) + x)

    return (''.join(s))
print(encryption(s1, 1))
print(encryption(s2, -1))