import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
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();
    }

}
