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

public class EarningMoney {
	public static int N = 0;
	public static int[][] arr = new int[11][10000];
	
	public static void main(String args[]) throws Exception {
		System.setIn(new FileInputStream("input.txt"));
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int tc = 1; tc <= T; tc++) {
			String num = sc.next();
			int size = num.length();
			N = sc.nextInt();
			arr[0][0] = Integer.parseInt(num);
			int max = 0;
			int count = 0;
			int count2 = 1;
			for (int i = 0; i < N; i++) {
				count = count2;
				count2 = 0;
				for (int j = 0; j < count; j++) {
					String string = String.valueOf(arr[i][j]);
					while (string.length() < size) {
						string = "0" + string;
					}
					char[] nums = string.toCharArray();
					for (int k = 0; k < string.length() - 1; k++) {
						for (int l = k + 1; l < string.length(); l++) {
							char t = nums[k];
							nums[k] = nums[l];
							nums[l] = t;
							
							int value = Integer.parseInt(String.valueOf(nums));
							
							boolean check = false;
							for (int m = 0; m < count2; m++) {
								if (arr[i + 1][m] == value) {
									check = true;
									break;
								}
							}
							
							if (!check) {
								arr[i + 1][count2++] = value;
							}
							if (i == N - 1 && max < value) {
								max = value;
							}
							
							t = nums[k];
							nums[k] = nums[l];
							nums[l] = t;
						}
					}
				}
			}
			System.out.println("Case #" + tc + "\n" + max);
		}
	}
}

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