#include<stdio.h>
int main()
{
    int n;
    scanf("%d", &n);
    int r= n%10;
    if(r==2 || r==4 || r==5 || r==7 || r==9)printf("hon\n");
    else if(r==0 || r==1 || r==6 || r==8)printf("pon\n");
    else printf("bon\n");
    return 0;
}
