#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct node *next;
    struct node *prev;
}Node;
Node *head=NULL,*tail;
void create(int num){
    Node *newnode=(Node*)malloc(1*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;
    }
    head->prev=tail;
    tail->next=head;
}
void insertion(int val){
    Node *newnode=(Node*)malloc(1*sizeof(Node));
    newnode->data=val;
    if(head==NULL){
    newnode->next=newnode;
    newnode->prev=newnode;
    head=newnode;
    }
    else{
        Node *tail=head->prev;
    tail->next=newnode;
    newnode->prev=tail;
    newnode->next=head;
    haed->prev=newnode;
}
}
void display(){
    Node *tail=head->prev;
    Node *itr=tail;
    do{
        printf("%d",itr->data);
        itr=itr->prev;
    }
    while(itr!=tail);
    printf("\n");
}
int main(){
    int n,i,num,val;
    scanf("%d",&n);
    if(n<=0){
        printf("Invalid input");
        return 0;
    }
    for(i=1;i<=n;i++){
        scanf("%d",&num);
        create(num);
    }
    scanf("%d",&val);
    insertion(val);
    display();
    return 0;
}