                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(int i=2;i>=0;i--){
                		int x=val%10;
                        int a[] = new int[3];
                		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(int i=1;i>=0;i--){
                		int x=val%10;
                        int a[] = new int[2];
                		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");
                          }
                    }
                  }
                }