package main

import (
	"fmt"
	"strings"
)

func main() {
	var alp, S string
	alp = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
	fmt.Scan(&S)
	s := strings.Split(S, "")
	alp_s := strings.Split(alp, "")
	//fmt.Println(alp_s)
	//fmt.Println(bytes.IndexByte(alp_s, "F"))
	//fmt.Println(strings.Index(alp, "F"))
	//fmt.Println(alp_s)
	//fmt.Println(s)
	for i := 0; i < len(s); i++ {
		s[i] = alp_s[(strings.Index(alp, s[i])-i+1039)%26]
	}
	//fmt.Println(s)
	fmt.Println(strings.Join(s, ""))
}