#include <stdio.h>

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