#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;
    default:
        break;
    }

    return 0;
}