#include <iostream>
#include <cstring>
using namespace std;

char s[1026];

int main()
{
	cin >> s;
	for ( int i = 0; s[i] != '\0'; i++ ) {
		s[i] = ((int)(s[i] - 'A') + 2599 - i) % 26 + 'A';
	}

	cout << s << endl;

	return 0;
}