#define _CRT_SECURE_NO_WARNINGS
//#include <algorithm>
//#include <iostream>
//#include <string>
#include <stdio.h>

//using namespace std;

int main(){
	char S[1025], newS[1025];
	S[0] = '\0';
	scanf("%s", S);
	
	for (int i = 0; i < 1025; i++){
		if (S[i] == '\0'){ 
			newS[i] = '\0';
			break; 
		}
		newS[i] = (S[i] + 12 + 26 * 40 - i) % 26 + 65;
	}
	
	
	printf("%s\n", newS);
	return 0;
}