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.IOException;
import java.math.BigDecimal;
import java.util.Arrays;
import java.util.List;

public class MinimumScalar extends JamProblem {
    public static void main(String[] args) throws IOException {
        MinimumScalar p = new MinimumScalar();
        p.go();
    }
    @Override
    String solveCase(JamCase jamCase) {
        MSCase c= (MSCase) jamCase;
        Arrays.sort(c.a);
        Arrays.sort(c.b);

        BigDecimal b = new BigDecimal(0);
        for (int i=0; i< c.lengh; i++) {
            BigDecimal aaa = new BigDecimal(c.a[i]);
            BigDecimal bbb = new BigDecimal(c.b[c.lengh - i - 1]);
            b = b.add(aaa.multiply(bbb));
        }
        return "" + b;
    }

    @Override
    JamCase parseCase(List<String> file, int line) {
        MSCase c= new MSCase();
        c.lineCount=3;
        int i = line;
        c.lengh = Integer.parseInt(file.get(i++));
        c.a = JamUtil.parseIntList(file.get(i++),c.lengh);
        c.b = JamUtil.parseIntList(file.get(i++),c.lengh);
        return c;
    }
}

class MSCase extends JamCase {
    int lengh;
    int[] a;
    int[] b;
}

