import java.io.*;
import java.util.*;

public class C {

    void solve() throws IOException {
        in("C-large.in"); out("C-large.out");

        long tm = System.currentTimeMillis();
        boolean[] mask = new boolean[2000000];
        int[] r = new int[10];
        int t = readInt();
        for (int cs = 1; cs <= t; ++cs) {
            int a = readInt();
            int b = readInt();
            int ans = 0;
            for (int m = a + 1; m <= b; ++m) {
                char[] d = String.valueOf(m).toCharArray();
                int c = 0;
                for (int i = 1; i < d.length; ++i) {
                    if (d[i] != '0' && d[i] <= d[0]) {
                        int n = 0;
                        for (int j = 0; j < d.length; ++j) {
                            int jj = i + j;
                            if (jj >= d.length) jj -= d.length;
                            n = n * 10 + (d[jj] - '0');
                        }
                        if (n >= a && n < m && !mask[n]) {
                            ++ans;
                            mask[n] = true;
                            r[c++] = n;
                        }
                    }
                }
                for (int i = 0; i < c; ++i) {
                    mask[r[i]] = false;
                }
            }
            println("Case #" + cs + ": " + ans);
            //System.out.println(cs);
        }
        System.out.println("time: " + (System.currentTimeMillis() - tm));
        exit();
    }

    void in(String name) throws IOException {
        if (name.equals("__std")) {
            in = new BufferedReader(new InputStreamReader(System.in));
        } else {
            in = new BufferedReader(new FileReader(name));
        }
    }

    void out(String name) throws IOException {
        if (name.equals("__std")) {
            out = new PrintWriter(System.out);
        } else {
            out = new PrintWriter(name);
        }
    }

    void exit() {
        out.close();
        System.exit(0);
    }

    int readInt() throws IOException {
        return Integer.parseInt(readToken());
    }

    long readLong() throws IOException {
        return Long.parseLong(readToken());
    }

    double readDouble() throws IOException {
        return Double.parseDouble(readToken());
    }

    String readLine() throws IOException {
        st = null;
        return in.readLine();
    }

    String readToken() throws IOException {
        while (st == null || !st.hasMoreTokens()) {
            st = new StringTokenizer(in.readLine());
        }
        return st.nextToken();
    }

    boolean eof() throws IOException {
        return !in.ready();
    }

    void print(String format, Object ... args) {
        out.println(new Formatter(Locale.US).format(format, args));
    }

    void println(String format, Object ... args) {
        out.println(new Formatter(Locale.US).format(format, args));
    }

    void print(Object value) {
        out.print(value);
    }

    void println(Object value) {
        out.println(value);
    }

    void println() {
        out.println();
    }

    StringTokenizer st;

    BufferedReader in;
    PrintWriter out;

    public static void main(String[] args) throws IOException {
        new C().solve();
    }
}

import java.io.*;
import java.util.*;

public class CodeJamC
{

	private static int noOfDigits(int number)
	{
		int noOfDigits = 0;
		while (number > 0)
		{
			number /= 10;
			noOfDigits++;
		}
		return noOfDigits;
	}

	private static int pow(int exponent)
	{
		int power = 1;
		for (int mulitply = 1; mulitply <= exponent; mulitply++)
			power *= 10;
		return power;
	}

	private static int countPairs(int A, int B)
	{

		int noOfDigits = noOfDigits(A);
		int noOfPairs = 0;
		int places = pow(noOfDigits);
		for (int next = A; next < B; next++)
		{
			HashSet<Integer> used = new HashSet<Integer>();
			// System.out.println("Next "+ next);
			for (int back = 10; back < places; back *= 10)
			{
				int recycled = shift(next, back, places / back);
				// System.out.println("Back: " + back + "RC " + recycled);
				if (recycled > next && recycled <= B)
				{
					// System.out.println(next +", " + recycled);
					if (!used.contains(recycled))
					{
						used.add(recycled);
						noOfPairs++;
					}
				}
			}
		}

		return noOfPairs;
	}

	private static int shift(int number, int back, int front)
	{
		return (number % back) * front + number / back;
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) throws IOException
	{
		String fileName = "C-large";
		Scanner in = new Scanner(new File(fileName + ".in"));
		PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(
				fileName + ".out")));

		// Keep track of time for efficiency
		long startTime = System.currentTimeMillis();
		// Process each of the test cases
		int noOfCases = in.nextInt();

		for (int caseNo = 1; caseNo <= noOfCases; caseNo++)
		{
			int A = in.nextInt();
			int B = in.nextInt();

			int noOfPairs = countPairs(A, B);

			System.out.println("Case #" + caseNo + ": " + noOfPairs);
			out.println("Case #" + caseNo + ": " + noOfPairs);
		}

		System.out.println("Done");
		long stopTime = System.currentTimeMillis();
		System.out.println("Time: " + (stopTime - startTime) / 1000.0);

		// Close the files
		in.close();
		out.close();
	}
}
