#include <iostream>
#include <algorithm>
#include <cstdio>
#include <string>

#define ll long long

using namespace std;

int main(){
  
 string s;
 cin>>s;
 for(int i=1;i<=s.length();++i){
     cout<<(char)((s[i-1]+i)%26+52);
 }
 cout<<endl;
  return 0;
}