#include<stdio.h>
#include<stdlib.h>
#include<string.h>
typedef struct node
{
    char data[20];
    struct node*next;
    struct node*prev;
}Node;
Node*head=NULL,*tail;
void create(char*ch)
{
    Node*newNode=(Node*)malloc(1*sizeof(Node));
    strcpy(newNode->data,ch);
    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*i=tail;
    for(;i!=head;i=i->next)
    {
        printf("%s",i->data);
    }
}
int main()
{
    int size,n;
    scanf("%d",&size);
    if(size<0)
    {
        printf("Invalid input");
        return 0;
    }
    char ch[20];
    for(i=1;i<=size;i++)
    {
        if(scanf("%s",&ch)!=1)
        {
            break;
        }
            create(ch);
    }
    display();
    return 0;
}