#! /usr/bin/env python

import sys

def decrypt(string):
    bytes = [ord(c) for c in string]
    for i in range(0, len(string)):
        bytes[i] = bytes[i] - i
    return ''.join(chr(c) for c in bytes)
    
while 1:
    try:
        line = sys.stdin.readline()
    except KeyboardInterrupt:
        break

    if not line:
        break

    print decrypt(line.rstrip('\n'))
