#include<stdio.h>

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