import java.util.*;
public class Main{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        if(sc.hasNextInt()){
        int n=sc.nextInt();
        if(n>1000&&n<0){
        
    System.out.print("Invalid input");
    return;
   int arr[]=new int[n];
        for(int i=0;i<n;i++){
            if(sc.hasNextInt()){
         arr[i]=sc.nextInt();
         if(arr[i]>1000){
             System.out.println("Invalid input");
             return;
         }
         System.out.print(arr[i]+" ");
            }
            
           
}
System.out.println();
for(int i=n-1;i>=0;i--){
    System.out.print(arr[i]+" ");
}
}else{
    System.out.print("Invalid input"); 
}
            

}else{
    System.out.print("Invalid input"); 
}
}
}