/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

import java.io.File;
import java.io.FileInputStream;
import java.util.Scanner;

/**
 *
 * @author imgps
 */
public class C {
    public static void main(String args[]) throws Exception{
        int A,B;
        int ctr = 0;
        int testCases;
        
        Scanner sc = new Scanner(new FileInputStream("C-small-attempt0.in "));
        testCases = sc.nextInt();
        int input[][] = new int[testCases][2];
        for(int i=0;i<testCases;i++)
        {
          //  System.out.print("Enter input A B: ");
            input[i][0] = sc.nextInt();
            input[i][1] = sc.nextInt();
            
        }
  

for(int k=0;k<testCases;k++){
      ctr = 0;
      A = input[k][0];
      B = input[k][1];
        for(int i = A;i<=B;i++){
            int num = i;
            int nMul = 1;
            int mul = 1; 
            int tnum = num/10;
            while(tnum > 0){
                mul = mul *10;
                tnum= tnum/10;
            }
            tnum = num;
            int n = 0;
            while(tnum > 0 && mul >= 10){
                nMul = nMul * 10;
                n = (num % nMul) * mul + (num / nMul);
                mul = mul / 10;
                tnum = tnum / 10;
                for(int m=num;m<=B;m++){
                    
                    if(n == m && m > num){
                        ctr++;
                    }
                }
                
                
                
         
            }
        }
        System.out.println("Case #"+(k+1)+": "+ctr);
        
    }
    }
}



import java.util.Scanner;

public class RecycledNumber {

	public int deal(int A, int B)
	{
		int ans = 0;
		for (int i = A; i<= B ; i ++)
		{
			int left = i;			
			int k = 1;
			int tk = 1;		
			UniqueList newInts = new UniqueList(10);
			while (left >= 10)
			{
				left = left / 10;
				tk = tk * 10;
			}
			left = i;
			while (k * 10 <= left)
			{
				k = k * 10;
				int x = (left % k) * (tk * 10 / k) + (left / k);
				//System.out.println(i + ": " + x);
				if (x > i && x <= B)
					newInts.add(x);
			}
			ans += newInts.getSize();
		}
		return ans;
	}
	
	public void solve()
	{
		Scanner scan = new Scanner(System.in);
		int T = scan.nextInt();scan.nextLine();
		for (int i = 1; i <= T; i ++)
		{
			int A = scan.nextInt();
			int B = scan.nextInt();
			System.out.println("Case #" + i + ": " + this.deal(A, B));
		}
	}
	
	public static void main(String args[])
	{
		RecycledNumber r = new RecycledNumber();
		r.solve();
	}
}
