public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int p = scan.nextInt();
for (int i = 0; i < p; i++) {
int line = scan.nextInt();
int m = scan.nextInt();
ArrayList<Integer> list = new ArrayList<Integer>();
int[] medians = new int[(m + 1) / 2];
int mPos = 0;
for (int j = 0; j < m; j++) {
insertSorted(list, scan.nextInt());
if (j % 2 == 0) medians[mPos++] = list.get(list.size() / 2);
}
System.out.println(line + " " + medians.length);
for (int j = 0; j < medians.length; j++) {
System.out.print(medians[j]);
if ((j + 1) % 10 == 0) System.out.println();
else System.out.print(" ");
}
if (medians.length % 10 != 0) System.out.println();
}
}
