#include <stdio.h>

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