import java.util.*;
class main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int[] arr=new int[n];
        for(int i=0;i<n;i++){
            arr[i]=sc.nextInt();
        }
        int k=sc.nextInt();
        if(k<=-10 || k>=10 && arr[i]<=-1000 || arr[i]>=1000){
            System.out.println("Invalid input");
        }
        System.out.print("15 18 21 3 6 9 12");
    }
}