#include<stdio.h>
int main(void){
 int n;
  scanf("%d",&n);
  switch(n%10){
    case 0:
    case 1:
    case 6:
    case 8:puts("pon");break; 
    case 2:
    case 4:
    case 5:
    case 7:
    case 9: puts("hon");break;
    default:puts("bon");break;
  }
  return 0;
}
