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package lv4;

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

import java.util.Scanner;

public class Test {
	static int[][] arr = new int[11][10005];

	public static int getNumber(char[] str, int size) {
		int res = 0;
		for (int i = 0; i < size; i++) {
			int number = str[i] - '0';
			res = res * 10 + number;
		}
		return res;
	}

	public static void changeNumber(int number, char[] str, int size) {
		for (int i = 0; i < size; i++) {
			char c = (char) ((number % 10) + '0');
			number /= 10;
			str[size - i - 1] = c;
		}
	}

	public static void main(String[] args) throws FileNotFoundException {
		System.setIn(new FileInputStream("Text"));
		Scanner scanner = new Scanner(System.in);
		int T = scanner.nextInt();

		for (int tc = 1; tc <= T; tc++) {
			char[] str = scanner.next().toCharArray();
			int N = scanner.nextInt();
			int size = str.length;
			int defaultValue = Integer.parseInt(String.valueOf(str));
			arr[0][0] = defaultValue;

			int count = 0, count2 = 1, max = 0;
			for (int l = 0; l < N; l++) {
				count = count2;
				count2 = 0;
				for (int k = 0; k < count; k++) {
					changeNumber(arr[l][k], str, size);

					for (int i = 0; i < size - 1; i++) {
						for (int j = i + 1; j < size; j++) {
							char tmp = str[j];
							str[j] = str[i];
							str[i] = tmp;
							int value = Integer.parseInt(String.valueOf(str));

							boolean existed = false;
							for (int m = 0; m < count2; m++) {
								if (arr[l + 1][m] == value) {
									existed = true;
									break;
								}
							}

							if (!existed)
								arr[l + 1][count2++] = value;
							if (l == N - 1 && max < value)
								max = value;

							char tmp2 = str[j];
							str[j] = str[i];
							str[i] = tmp2;
						}
					}
				}
			}

			System.out.println("Case #" + tc + "\n" + max);
		}
	}
}