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.util.Scanner;
import java.util.List;
import java.util.ArrayList;

public class Recycled{

    private Scanner input;

    private int min = 0;
    private int max = 0;
    
    private ArrayList<ArrayList<Integer>> list;

    public Recycled(){
        input = new Scanner(System.in);
        list = new ArrayList<ArrayList<Integer>>();
    }

    public void run(){
        precompute(2000000);
        int T = input.nextInt();
        for(int i = 1; i<=T; i++){
            int A = input.nextInt();
            int B = input.nextInt();
            System.out.printf("Case #%d: %d\n",i,check(A,B));
        }
    }

    public void precompute(int max){
        list.add(new ArrayList<Integer>());
        for(int i = 1; i <= max; i++){
            list.add(new ArrayList<Integer>());
            String n = String.valueOf(i);
            for(int m = 1; m<n.length(); m++){
                String temp = n.substring(m).concat(n.substring(0,m));
                if(temp.charAt(0) != '0' && !temp.equals(n) && !list.get(i).contains(Integer.valueOf(temp))){
                    list.get(i).add(Integer.valueOf(temp));
                }
            }
        }
    }

    public int check(int A, int B){
        if(A == B)
            return 0;
        int result = 0;
        for(int n = A; n < B; n++){
            for(Integer i: list.get(n)){
                if(i >= n && i <= B){
                    result++;
                }
            }
        }
        return result;
    }

    public static void main(String[] args){
        Recycled object = new Recycled();
        object.run();
    }

}
