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();
		}
	}
}

//Kholofelo Moyaba
//Problem C codejam
//14 April 2012

import java.util.Scanner;

class RecycledNumbers
{
    public static void main(String[] args)
    {
        Scanner input = new Scanner(System.in);
        int cases = input.nextInt();
        for(int i=1;i<=cases;i++)
        {
            int a = input.nextInt();
            int b = input.nextInt();
            int digits = (a+"").length()-1;//number of digits -1
            int factor = 1;//factor in order of a and b
            for(int j=0;j<digits;j++,factor*=10);//factor=10^digit
            int result = 0;
            for(int n=a;n<b;n++){
                int[] buffer = new int[digits];//current pairs
                int m = n;//rotation of n into m
                for(int j=0;j<digits;j++){
                    m = m/10 + (m%10)*factor;//rotate
                    if(m<=b && n<m)//recycled pair
                    {//check if duplicate
                        boolean distinct = true;
                        for(int k=0;k<j;k++)
                            if(buffer[k]==m)
                            {
                                distinct = false;
                                break;
                            }
                        if(distinct)
                        {
                            result++;
                            buffer[j] = m;
                        }
                    }
                }
            }
            System.out.println("Case #"+i+": "+result);
        }
    }
}