import java.util.*; public class Main{ public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n = sc.nextInt(); String[] arr = new String[n]; for (int i = 0; i < n; i++) { int m = sc.nextInt(); String str = sc.next(); char[] arr2 = new char[m * str.length()]; int k = 0; for (int j = 0; j < str.length(); j ++) { Arrays.fill(arr2, k, k+m, str.charAt(j)); k += m; } arr[i]..