#include <iostream>
#include <string>

using namespace std;

int main() {
	string str;
	cin >> str;
	for (int i = 0; i < str.length();i++) {
		str[i] = ((str[i] - 'A') + ((str.length()/26)*26 + 25 - i)) % 26 + 'A';
	}
	cout << str << endl;
	return 0;
}