    import java.util.Scanner;
     
    public class main {
      public static void main(String args[]){
     
        Scanner scan = new Scanner(System.in);
        int val = scan.nextInt();
        if(val>99){
        for(i=2;i>=0;i--){
    		x=val%10;
    		a[i]=x;
    		val=val/10;
        }
              if(a[2]==2 ||a[2]==4 || a[2]==5 || a[2]==7 || a[2]==9){
    			System.out.println("hon");
              }else if(a[2]==0 ||a[2]==1 || a[2]==6 ||a[2]==8){
    			System.out.println("pon");
              }else{
                System.out.println("bon");
              }
        }else if(val>9){
           for(i=1;i>=0;i--){
    		x=val%10;
    		a[i]=x;
    		val=val/10;
        }
              if(a[1]==2 ||a[1]==4 || a[1]==5 || a[1]==7 || a[1]==9){
    			System.out.println("hon");
              }else if(a[1]==0 ||a[1]==1 || a[1]==6 ||a[1]==8){
    			System.out.println("pon");
              }else{
                System.out.println("bon");
              }
        }else{
          if(val==2 ||val==4 || val==5 || val==7 || val==9){
    			System.out.println("hon");
              }else if(val==0 ||val==1 || val==6 || val==8){
    			System.out.println("pon");
              }else{
                System.out.println("bon");
              }
        }