import java.util.*;
import java.util.stream.Stream;
import java.time.*;
import java.time.format.*;

public class No597 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		for(int i = 0; i < n; i++) {
			System.out.print(sc.next());
		}
	}
}