import java.io.*;

public class Main{
	public static void main(String[] args)throws IOException{
    	BufferdReader br=new BufferdReader(new InputStreamReader(System.in));
      
      int n;
      n=Integer.parseInt(br.readLine());
      n=n%10;
      switch(n){
      	case:2
        case:4
        case:5
        case:7
        case:9
          System.out.println("hon");
        case:0
        case:1
        case:6
        case:8
          System.out.println("pon");
        case:3
          System.out.println("bon");
      }
    }	
}