/*
 * 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.FileInputStream;
import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.Set;


public class RecycleNumber {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception{
		BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(".in")));
		int num =0;
		String line = null;
		line = br.readLine();
		int i=0;
		num = Integer.parseInt(line);
		
		while(num-->0){
			int result = 0;
			line = br.readLine();
			i++;
			String[] nums = line.split(" ");
			int min = Integer.parseInt(nums[0]);
			int max = Integer.parseInt(nums[1]);
			
			for(int t=min;t<=max;t++){
				result += countRecyles(t,min,max);
			}
			
			System.out.println("Case #"+i+": "+result/2);
			
		}
		br.close();
	}
	
	public static int countRecyles(int num,int min,int max){
		int count = 0;
		Set<Integer> result = getNums(num);
		for(int i:result){
			if(i>=min&&i<=max){
				count++;
			//	System.out.println(num+","+i);
			}
			
		}
		
		return count;
	}
	
	public static Set<Integer> getNums(int num){
		Set<Integer> list = new HashSet<Integer>();
		
		StringBuilder sb = new StringBuilder(num+"");
		for(int i=0;i<sb.length();i++){
			char last = sb.charAt(sb.length()-1);
			sb.deleteCharAt(sb.length()-1);
			sb.insert(0, last);
			if(last!='0'){
				int tmp = Integer.parseInt(sb.toString());
				if(tmp != num)
					list.add(tmp);
			}
		}
		
		return list;
	}
	

}
