#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");
		break;
	case 0:
    case 1:
    case 6:
    case 8:
		printf("pon");
		break;
	default:
		printf("bon");
		break;
}
  
return 0;
}