/*
 * 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.io.BufferedReader;
import java.io.InputStreamReader;


public class C {

	boolean rec(int i, int j){
		String s1 = i+"";
		String s2 = j+"";
		if(s1.length() != s2.length())
			return false;
		
		String concat = s1+s1;
		if(!concat.contains(s2))
			return false;
		return true;
	}
	void run() {
		try {
			BufferedReader bfd = new BufferedReader(new InputStreamReader(
					System.in));
			int tc = Integer.parseInt(bfd.readLine()), i, j, k, a, b, cnt;
			String sp[];
			for(k=0; k<tc; ++k){
				sp = bfd.readLine().split(" +");
				a = Integer.parseInt(sp[0]);
				b = Integer.parseInt(sp[1]);
				cnt = 0;
				for(i=a; i<=b; ++i)
					for(j=i+1; j<=b; ++j)
						if(rec(i, j))
							cnt++;
				System.out.print("Case #"+(k+1)+": "); 
				System.out.print(cnt);
				System.out.println();
			}
			
		} catch (Exception e) {
		}
	}

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

}

