import java.util.Scanner;

public class demo {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int n = Integer.parseInt(scanner.nextLine());
        int m = Integer.parseInt(scanner.nextLine());
        int l = Integer.parseInt(scanner.nextLine());

        for (int i = 1; i <= n; i++) {
            if (i % 2 == 0) {
                for (int j = 1; j <= m; j++) {

                    int counter = 0;

                    for (int p = 2; p <= j / 2; p++) {

                        if (j % p == 0) {
                            counter++;
                        }
                    }

                    if (counter == 0&&j!=1) {

                        for (int k = 1; k <= l; k++) {
                            if (k % 2 == 0) {
                                System.out.printf("%d %d %d%n", i, j, k);
                            }

                        }
                    }

                }
            }
        }


    }
}