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.*;

/*
 * To change this template, choose Tools | Templates and open the template in
 * the editor.
 */
/**
 * Problem C. Recycled Numbers
 *
 * @author admin
 */
public class ProblemC_RecycledNumbers {

    public static void main(String[] args) throws FileNotFoundException, IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("c:/C-large.in")));

        br.readLine();  // Ignore T

        StringBuilder sb = new StringBuilder();
        int row = 1;

        for (String line = br.readLine(); line != null; line = br.readLine()) {
            sb.append("Case #");
            sb.append(row);
            sb.append(": ");
            int ret = 0;
            String[] numbers = line.split(" ");
            int A = Integer.parseInt(numbers[0]);
            int B = Integer.parseInt(numbers[1]);
            
            for (int m = A+1; m <= B; m++) {
                for (int n = A; n < m; n++) {
                    if(recycled(n, m)) {
                        ret++;
                    }
                }
            }
            
            sb.append(ret);
//            System.out.println(ret);
            sb.append('\n');
            row++;
        }
        
        File file=new File("ProblemC_RecycledNumbers.out");
        DataOutputStream output=new DataOutputStream(new FileOutputStream(file));
        output.write(sb.toString().getBytes());
        output.close();

    }

    public static boolean recycled(int n, int m) {
        
        String strN = String.valueOf(n);
        String strM = String.valueOf(m);
        
        for(int i=1; i<strN.length(); i++) {
            String temp = strN.substring(i) + strN.substring(0, i);
            
            if(strM.equals(temp)) {
                return true;
            }
        }

        return false;
    }
}
