#include <stdio.h>
int main(){
int n;
  scanf("%d",&n);
  n %=10;
  if(n == 2 || n == 4 || n == 5 || n == 7||n == 9)
  printf("hon");
  else if(n == 0 || n == 1 || n == 6 || n == 8)
  printf("pon");
  else
  printf("bon");
}
