#include <stdio.h>
#include <stdlib.h>

int main(void) {
  int n;
  scanf("%d", &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;
}
