#include <stdio.h>
#include <string.h>
#include <math.h>

int main (){

  int N = 0;
  scanf("%d", &N);

  if( N % 10 == 2 || N % 10 == 4 || N % 10 == 5 || N % 10 == 7 || N % 10 == 9 ){
    printf("hon \n");
  }
  else if( N % 10 == 0 || N % 10 == 1 || N % 10 == 6 || N % 10 == 8 ){
    printf("pon \n");
  }
  else if( N % 10 == 3 ){
    printf("bon \n");
  }

  return 0;
}