int main(){
  int N,n;
  scanf("%d",N);
  if(N>1000 || N<1) return 0;
  n = N%10;
  if(n==2 || n==4 || n==5 || n==7 || n==9) printf("hon");
  if(n==0 || n==1 || n==6 || n==8 ) printf("pon");
  if(n==3) printf("bon");
  return 0;
}