#include <vector>
#include <string>
#include <iostream>

using namespace std;

int main(){
	int i, j, n;
	string A = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	string S;
	string str = {};
	cin >> S;
	for( i = 0; i < S.size(); i++ ) {
		n = i % A.size();
		//cout << n << " ";
		for( j = 0; j < A.size(); j++){
			if( S[i] == A[j]){
				//cout << j << " ";
				break;
			}
		}
		if ( n + 1 > j ) {
			n = A.size() - ((n + 1) - j);
		} else {
			n = j - (n + 1);
		}
		//cout << n << endl;
		str += A[n];
	}
	cout << str << endl;
	return 0;
}