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