#include<stdio.h>
int main(){
  int unused __attribute__((unused));
  int N;

  unused = scanf("%d", &N);
  N = N%10;
  if(N==2 || N==4 || N==5 || N==7 || N==9) printf("hon");
  else if(N==0 || N==1 || N==6 || N==8) printf("pon");
  else printf("bon");
  return 0;
}