            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");
                      }
                }
              }
            }