package qual;

import java.util.Scanner;

public class RecycledNumbers {

	public static void main(String[] args) {
		new RecycledNumbers().run();

	}

	private void run() {
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int t = 0; t < T; t++) {
			int A = sc.nextInt();
			int B = sc.nextInt();
			int result = solve(A, B);
			System.out.printf("Case #%d: %d\n", t + 1, result);
		}
	}

	public int solve(int A, int B) {
		int result = 0;
		for (int i = A; i <= B; i++) {
			int dig = (int) Math.log10(A/*same as B*/) + 1;
			int aa = i;
			for (int d = 0; d < dig - 1; d++) {
				aa = (aa % 10) * (int)Math.pow(10, dig - 1) + (aa / 10);
				if (i == aa) {
					break;
				}
				if (i < aa && aa <= B) {
//					System.out.printf("(%d, %d) ", i, aa);
					result++;
				}
			}
		}
		return result;
	}

}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map.Entry;
import java.util.Set;

public class CodeJam
{

    private Set<Integer> generateCombination(Integer i, Integer max)
    {
        final Set<Integer> output = new HashSet<Integer>();
        final Integer len = String.valueOf(i).length();

        Integer num = i;
        double pow = Math.pow(10, len - 1);

        for (int j = 0; j < len - 1; ++j)
        {
            num = (int) ((num % pow) * 10 + (num / pow));
            if (num > i && num <= max)
                output.add(num);
        }

        return output;
    }

    private List<HashMap<Integer, Integer>> getInputValue()
    {
        List<HashMap<Integer, Integer>> inpVal = new ArrayList<HashMap<Integer, Integer>>();

        BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
        try
        {
            final String tc_ = stdin.readLine();
            Integer testCase = Integer.parseInt(tc_);

            while (testCase-- > 0)
            {
                // System.err.println("tc#" + testCase);
                final String[] input = stdin.readLine().split(" ");
                final int min = Integer.parseInt(input[0]);
                final int max = Integer.parseInt(input[1]);

                inpVal.add(new HashMap<Integer, Integer>() {
                    {
                        put(min, max);
                    }
                });
            }

            return inpVal;
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }

        return null;
    }

    public static void main(String[] args)
    {
        CodeJam cj = new CodeJam();
        List<HashMap<Integer, Integer>> inp = cj.getInputValue();
        int count = 1;

        for (HashMap<Integer, Integer> tc : inp)
        {

            // operating for tc
            int min = 0, max = 0;
            int answer = 0;
            for (Entry<Integer, Integer> e : tc.entrySet())
            {
                min = e.getKey();
                max = e.getValue();
            }
            for (int i = min; i <= max; ++i)
            {
                answer += cj.generateCombination(i, max).size();
            }
            System.out.println("Case #" + count++ + ": " + answer);

        }

        // System.err.println(cj.generateCombination(24, 40));
    }
}
