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