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

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

import java.io.*;
import java.util.Arrays;
import java.util.Locale;
import java.util.Scanner;

public class RecycledNumbers {
    // -ea âXmx256M âXss64M
    long A, B;

    private Object solve() throws Exception {
        long result = 0;
        for (long n = A; n < B; n++) {
            long d = 1;
            while (d <= n) d *= 10;
            d /= 10;

            long m = n;
            do {
                m = (m % d) * 10 + m / d;
                if (n < m && m <= B) {
                    result++;
                }
            } while (m != n);
        }
        return result;
    }

    private void load() throws Exception {
        A = nextLong();
        B = nextLong();
        log.print("A: " + A + ", B: " + B);
    }


    private static final String PREFIX = "C-large";
    private static final String PATH = "d:/gcjam12/qr/";
    private static final String POSTFIX_IN = ".in";
    private static final String POSTFIX_OUT = ".out";
    private static final PrintStream log = System.out;

    public static void main(String args[]) throws Exception {
        Locale.setDefault(Locale.US);
        InputStreamReader reader = new InputStreamReader(new BufferedInputStream(new FileInputStream(PATH + PREFIX + POSTFIX_IN)));
        PrintStream out = new PrintStream(new FileOutputStream(PATH + PREFIX + POSTFIX_OUT));
        Scanner in = new Scanner(reader);

        long t0 = System.nanoTime();
        int testCount = in.nextInt(); in.nextLine();
        for (int testIndex = 1; testIndex <= testCount; testIndex++) {
            log.printf("Data #%d: ", testIndex);

            RecycledNumbers s = new RecycledNumbers();
            s.in = in;
            s.load();
            s.in = null;
            log.println();

            long t1 = System.nanoTime();
            String result = "Case #" + testIndex + ": " + s.solve();

            out.println(result);
            log.println(result);
            log.printf("Time #%d: %.6f sec\n\n", testIndex, (System.nanoTime() - t1) / 1e9);
        }
        log.printf("Total time: %.6f sec", (System.nanoTime() - t0)/1e9);

        reader.close();
        out.close();
    }

    private Scanner in;
    private int nextInt() { return in.nextInt(); }
    private long nextLong() { return in.nextLong(); }
    private double nextDouble() { return Double.parseDouble(in.next()); }
    private String nextLine() { return in.nextLine().trim(); }
    private void skipLine() { in.nextLine(); }
    private String next() { return in.next().trim(); }
    private int[] nextIntArray(int size) { int[] a = new int[size]; for (int i = 0; i < size; i++) a[i] = in.nextInt(); return a; }
    private long[] nextLongArray(int size) { long[] a = new long[size]; for (int i = 0; i < size; i++) a[i] = in.nextLong(); return a; }
    private double[] nextDoubleArray(int size) { double[] a = new double[size]; for (int i = 0; i < size; i++) a[i] = Double.parseDouble(in.next());  return a; }
    private String[] nextLineArray(int size) { String[] a = new String[size]; for (int i = 0; i < size; i++) a[i] = in.nextLine().trim(); return a; }
    private String[] nextTokenArray(int size) { String[] a = new String[size]; for (int i = 0; i < size; i++) a[i] = in.next().trim(); return a; }
}
