#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;
int num;
void create(int num){
    Node *newnode=(Node*)malloc(1*sizeof(Node));
    newnode->data=num;
    newnode->next=NULL;
    newnode->prev=NULL;
    if(head==null){
        head=newnode;
        tail=newnode;
    }
    else{
        tail->next=newnode;
        newnode->prev=newnode;
        tail=newnode;
    }
}
void display(){
    Node *itr=tail;
    for(;itr=head;itr=itr->prev){
        printf("%s",itr->data);
    }
    printf("%s",itr->data);
}
int main(){
    int size,i;
    scanf("%d",&size);
    if(size<0){
        printf("Invalid input");
        return 0;
    }
    char ch[20];
    for(itr=1;itr<=size;itr++){
        if(scanf("%s",ch!=1))
        break;
        create(ch);
    }
    display();
    return 0;
}