#include <stdio.h>

int main(void){
  int N;
  scanf("%d",&N);
  N=N%10;
  if(N==3){
    printf("bon");
  }else if(N==0||N==1||N==6||N==8){
    printf("pon");
  }else{
    printf("hon");
  }
  return 0;
}