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");
          break;
        case 0:
        case 1:
        case 6:
        case 8:
          System.out.println("pon");
          break;
        case 3:
          System.out.println("bon");
          break;
      }
    }	
}