# include<stdio.h>
int main()
{
    int N,X;
    scanf("%d",&N);
    x=N%10;
    if(x==3){
     printf("bon\n");
}
  else if(x==0||x==1||x==6||x==8)
    printf("pon\n");
  else
     printf("hon\n");
     return 0;
}