# Caesar cipher.
text = input("Enter your message: ")
cipher = ''
for char in text:
    if char.isspace():
        cipher +=char
    if not char.isalpha():
        continue
    char = char.lower()
    code = ord(char) + 1
    if code = ord('z'):
        code = ord('a')
    cipher += chr(code)
print(cipher)