// editor4
// editor3
// editor2
#include<stdio.h>
#include<stdlib.h>
typedef struct Node{
    int data;
    struct Node*prev;
    struct Node*next;
}node;
node*head=NULL,*tail;
void create(int num){
    node*newnode=(node*)malloc(sizeof(node));
    newnode->data=num;
    newnode->prev=NULL;
    newnode->next=NULL;
    if(head==NULL){
        head=newnode;
        tail=newnode;
    }
    else{
        newnode->prev=tail;
        tail->next=newnode;
        tail=newnode;
    }
}

void display(){
    node*itr;
    for(itr=head;itr!=NULL;itr=itr->next){
        printf("%d ",itr->data);
    }
    printf("\n");
    
    for(itr=head;itr!=NULL;itr=itr->next){
       j=itr->next;
        while(j!=NULL){
            if(itr->data==j->data){
                temp=j;
                j=j->next;
                if(temp->next!=NULL){
                    temp->next->prev=temp->prev;
                }
                temp->prev->next=temp->next;
                if(temp==tail){
                tail=temp->prev;
                }
                 free(temp);
            }
            else{
                j=j->next;
            }
           
            
        }
    }
    
    for(itr=head;itr!=NULL;itr=itr->next){
        printf("%d",itr->data);
    }
   
    
}
int main(){
    int n,num;
    scanf("%d",&n);
    if(n<=0){
        printf("Invalid input");
        return 0;
    }
    for(int i=1;i<=n;i++){
        scanf("%d",&num);
        create(num);
    }
    display();
    return 0;
}