#include <stdio.h>
int main(){
  int x,a;
  scanf("%d",&x);
  a=x%10;
  switch(a){
    case 2:
    case 4:
    case 5:
    case 7:
    case 9:
      printf("hon\n");
      break;
    case 3:
      printf("bon\n");
      break;
    default:
      printf("pon\n");
  }
}