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import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class EarningBiggestPrizeMoney2 {
	static {
		try {
			System.setIn(new FileInputStream("src/inp.txt"));
			// System.setOut(new PrintStream("src/out.txt"));
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	static Scanner scanner = new Scanner(System.in);
	static String res;
	static int kleft;

	static void swap(char[] s, int a, int b) {
		char tmp = s[a];
		s[a] = s[b];
		s[b] = tmp;
	}

	static void Try(char[] str, int k) {
		if (k == 0)
			return;

		int n = str.length;
		for (int i = 0; i < n - 1; ++i)
			for (int j = i + 1; j < n; ++j)
				if (str[j] > str[i]) {
					swap(str, i, j);

					String tmp = String.valueOf(str);
					if (tmp.compareTo(res) > 0) {
						res = tmp;
						kleft = k - 1;
					}

					Try(str, k - 1);
					swap(str, i, j);
				}
	}

	static void exec(int t) {
		res = scanner.next();
		int nch = Integer.parseInt(scanner.next());
		kleft = nch;

		Try(res.toCharArray(), nch);

		if (kleft > 0) {
			int[] chk = new int[10];
			boolean chk2 = false;
			for (int i = 0; i < res.length(); ++i)
				chk[res.charAt(i) - '0']++;

			for (int i = 0; i < 10; ++i)
				if (chk[i] > 1) {
					chk2 = true;
					break;
				}

			if ((kleft & 1) == 0 || chk2)
				System.out.printf("Case #%d\n%d\n", t, Integer.parseInt(res));
			else {
				char[] res2 = res.toCharArray();
				swap(res2, res2.length - 1, res2.length - 2);
				System.out.printf("Case #%d\n%d\n", t,
						Integer.parseInt(String.valueOf(res2)));
			}
		} else
			System.out.printf("Case #%d\n%d\n", t, Integer.parseInt(res));
	}

	public static void main(String[] args) {
		int t = Integer.parseInt(scanner.next());

		for (int i = 1; i <= t; ++i)
			exec(i);

		scanner.close();
	}
}