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 compete;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;

public class Recycle {
	private static void print(String sth) {
		System.out.println(sth);
	}

    private static int recycle(int A, int B) {
        
        int n=0;
        for (int i=A;i<B;i++) {
            String t = i+"";

            ArrayList<Integer> l = new ArrayList<Integer>();
            for (int k=0;k<t.length();k++) {
                char c = t.charAt(0);
                t = t.substring(1)+c;	
                if (t.charAt(0)=='0') continue;
                int ti = Integer.parseInt(t);
                if (ti>B||ti<=i) continue;
                if (!l.contains(ti)) {
                	l.add(ti);
                	n++;
                }
            }
        }

        return n;
    }

	public static void main(String args[]) throws IOException {
		BufferedReader in = new BufferedReader(new FileReader("input.txt"));
		
		int num = Integer.parseInt(in.readLine());
		
		for (int i=0;i<num;i++) {
			String sentence = in.readLine();
			Scanner s = new Scanner(sentence);
			
			int A = s.nextInt();
			int B = s.nextInt();
			
			print("Case #"+(1+i)+": "+recycle(A,B));
		}	
	}
}
