题解 | #字符串加解密#

def check(str,f):
    l1 = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
    l2 ='BCDEFGHIJKLMNOPQRSTUVWXYZAbcdefghijklmnopqrstuvwxyza1234567890'
    res = ''
    for i in str:
        if f == 1:
            res += l2[l1.index(i)]
        elif f == -1:
            res += l1[l2.index(i)]
    return res

print(check(input(),1))
print(check(input(),-1))