#include <stdio.h>
int main(void) {
  int N;
  scanf("%d", &N);
  switch (N % 10) {
    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;
    
    default:
      printf("bon\n");
      break;
  }
  return(0);
}
