#include<stdio.h>

int main()
{
    int Anum,FirstNo;
    cin >>
        Anum;
    //桁数チェック
    FirstNo = Anum%10;

switch(FirstNo){
    case 3:
        puts("bon");
        break;
    case 0:
    case 1:
    case 6:
    case 8:
        puts("pon");
        break;
    case 2:
    case 4:
    case 5:
    case 7:
    case 9:
        puts("hon");
        break;
}
return 0;
}
