#include <stdio.h>

#define BUF 1024
#define A 64
#define TYPE 26

int main(int argc, char const* argv[])
{
  char str[BUF];
  int k;

  gets(str);
  for ( k = 1; str[k-1] != '\0'; k++ )
  {
    str[k-1] -= k % TYPE;
    if ( str[k-1] <= A ) { str[k-1] += TYPE; }
  }
  puts(str);

  return 0;
}