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.util.List;

public class StoreCredit extends JamProblem {
    public static void main(String[] args) throws IOException {
        StoreCredit problem= new StoreCredit();
        problem.go();
    }

    @Override
    String solveCase(JamCase jamCase) {
        StoreCreditCase cas = (StoreCreditCase) jamCase;
        for (int i=0; i<cas.itemCount; i++) {
            for (int j=0; j<cas.itemCount; j++) {
                if (i==j) {
                    continue;
                }
                if (cas.prices[i] + cas.prices[j] == cas.credit) {
                    return "" + (i+1) + " " + (j+1);
                }
            }
        }
        throw new RuntimeException();
    }

    @Override
    JamCase parseCase(List<String> file, int line) {
        StoreCreditCase cas = new StoreCreditCase();
        String fist =  file.get(line);
        String second =  file.get(line+1);
        String third =  file.get(line+2);
        cas.credit= Integer.parseInt(fist);
        cas.lineCount = 3;
        cas.itemCount = Integer.parseInt(second);
        cas.prices = JamUtil.parseIntList(third, cas.itemCount);
        return cas;
    }
}

class StoreCreditCase extends JamCase {
    int itemCount;
    int[] prices;
    public int credit;
}
