#include <stdio.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;
   }
