#include <stdio.h>

int main(){
  int n;
  scanf("%d\n",&n);
  
  switch(n % 10){
      case 2:
      case 4:
      case 5:
      case 7:
      case 9:
        puts("hon");
        break;
      case 0:
      case 1:
      case 6:
      case 8:
        puts("pon");
        break;
      case 3:
        puts("bon");
        break;
  }
  return 0;
}
