#include <iostream>
using namespace std;
int main(void){
    // Your code here!
    char s[1024] = {};
    
    cin >> s;
    
    for(int i = 0; i < 1024; i++) {
        int a = i % 26;
        if(s[i] == 0)break;
        if(s[i] - (a + 1) == '@'){
            s[i] = 'Z';
        } else {
            s[i] = s[i] - (a + 1);
        }
        
    }
    
    cout << s;
    
    
    
    
}