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();
		}
	}
}

package gcj;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;

public abstract class SolverBase {

    public static final String TOKEN_SEPARATOR = " ";

    public static final String IMPOSSIBLE = "IMPOSSIBLE";

    public String problemName;

    public boolean verbose = false;

    public SolverBase(String problemName) {
        this.problemName = problemName;
    }

    public void solve(InputStream in, PrintStream out) throws Exception {
        InputStreamReader isr = new InputStreamReader(in);
        BufferedReader reader = new BufferedReader(isr);
        long N = Long.parseLong(reader.readLine());
        for (long i = 1; i <= N; i++) {
            out.print("Case #" + i + ": ");
            solveSingle(reader, out);
        }
    }

    public abstract void solveSingle(BufferedReader reader, PrintStream out) throws Exception;

    public long[] readSingleLineLongArray(BufferedReader reader) throws Exception {
        String[] longsAsStrings = readSingleLineStringArray(reader);
        long[] longs = new long[longsAsStrings.length];
        for (int i = 0; i < longsAsStrings.length; i++) {
            longs[i] = Long.parseLong(longsAsStrings[i]);
        }
        return longs;
    }

    public int[] readSingleLineIntArray(BufferedReader reader) throws Exception {
        String[] intsAsStrings = readSingleLineStringArray(reader);
        int[] ints = new int[intsAsStrings.length];
        for (int i = 0; i < intsAsStrings.length; i++) {
            ints[i] = Integer.parseInt(intsAsStrings[i]);
        }
        return ints;
    }

    public String[] readSingleLineStringArray(BufferedReader reader) throws Exception {
        String line = reader.readLine();
        if (verbose) {
            System.out.println("Reading line " + line);
        }
        return line.split(TOKEN_SEPARATOR);
        // return StringUtils.split(line, TOKEN_SEPARATOR);
    }

    public String[][] readStringArrays(BufferedReader reader, int lines) throws Exception {
        String[][] arrays = new String[lines][];
        for (int i = 0; i < lines; i++) {
            arrays[i] = readSingleLineStringArray(reader);
        }
        return arrays;
    }

    public char[][] readCharArrays(BufferedReader reader, int lines) throws Exception {
        char[][] arrays = new char[lines][];
        for (int i = 0; i < lines; i++) {
            String line = reader.readLine();
            arrays[i] = line.toCharArray();
        }
        return arrays;
    }

    public long[][] readLongArrays(BufferedReader reader, int lines) throws Exception {
        long[][] arrays = new long[lines][];
        for (int i = 0; i < lines; i++) {
            arrays[i] = readSingleLineLongArray(reader);
        }
        return arrays;
    }

    protected void check(boolean b) {
        if (!b) {
            throw new IllegalStateException("Check failed");
        }
    }
}
