#include<iostream>

using namespace std;

int main(void)
{
  string s; cin>>s;
  int s_size=0;  
  while(s[s_size]){s_size++;}
  int j_max=s_size/26;
  
  for(int i=0;i<s_size;i++){
    s[i]=s[i]-(i+1);
    for(int j=0;j<j_max;j++){
      if((s[i]<'A')||('Z'<s[i])){s[i]+=26;}
    }
  }
  
  cout<<s<<endl;
  
  return 0;
}