#include <iostream>
#include <list>
#include <vector>
#include <string>
#include <stdio.h>
#include <stdint.h>
using namespace std;

using uint = unsigned int;
using ll = long long;

void Solve( const string& S );

int main()
{

  string S;
  cin >> S;
  Solve( S );
  return 0;

}

void Solve( const string& S )
{

  const char A = 'A';
  const char Z = 'Z';
  const uint d = (uint)( Z - A + 1 );
  const uint& size = S.size();

  for( uint i = 0 ; i < size ; i++ ){

    const char c = A + ( ( ( S[i] - A ) + ( d - ( ( i + 1 ) % d ) ) ) % d );
    cout << c;

  }

  cout << endl;
  return;
  
}