import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        char[] aArr = sc.next().toCharArray();
        char[] bArr = sc.next().toCharArray();
        char[] cArr = new char[n * 2];
        for (int i = 0; i < n; i++) {
            cArr[i * 2] = aArr[i];
            cArr[i * 2 + 1] = bArr[i];
        }
        System.out.println(cArr);
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz