"""Apply ROT13 encoding."""

import sys									# sys.stdout.write()

text = raw_input("Input text? ")

for idx in range(len(text)):        # iterate over string
    char = text[idx]
    code = ord(char)
    if (code >= ord('a')) and (code <= ord('z')):   # lower
        code += 13
        if code > ord('z'):         # wraparound
            code -= 26
    elif (code >= ord('A')) and (code <= ord('Z')): # upper
        code += 13
        if code > ord('Z'):         # wraparound
            code -= 26
    char = chr(code)
    sys.stdout.write(char)
print