Python3 代码

s = input()

c = ""

for i in range (len(s)):
    if ( s[i] >="a" and s[i] <"z" ) or (s[i] >= "A" and s[i] <"Z"):
        c += chr(ord(s[i]) + 1)
    elif s[i] == "z":
        c += "a"
    elif s[i] == "Z":
        c += "A"
    else:
        c += s[i]

print (c)