#define REP(i,n) for(int i=0; i<(int)(n); i++)

#include <cstring>
#include <cstdio>
#include <set>

using namespace std;

int main(){
  char buff[1026];
  scanf("%s", buff);
  const int len = strlen(buff);
  const int n = 'z' - 'a' + 1;
  REP(i,len){ buff[i] = (buff[i] - 'A' + (n - 1) * (i + 1)) % n + 'A'; }
  puts(buff);
  return 0;
}