#include <stdio.h>
int main(void){
   int N;
  scanf("%d",&N);
  int split;
  split=N%10;
  switch(split){
    case 2:
    case 4:
    case 5:
    case 7:
    case 9:
      printf("hon\n");
      break;
    case 0:
    case 1:
    case 6:
    case 8:
      printf("pon\n");
      break;
    case 3:
      printf("bon\n")
        break;
  }
  return 0;
}