/*
 * 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.*;
import java.io.*;
import static java.lang.Math.*;

public class C {
	public static void main(String[] args) throws IOException {
		BufferedReader in = new BufferedReader(new FileReader("C:/Users/Farnoosh/Desktop/C-small.in"));
		FileWriter fw = new FileWriter("C:/Users/Farnoosh/Desktop/C-small.out");
		/*BufferedReader in = new BufferedReader(new FileReader("C:/Users/Farnoosh/Desktop/C-large.in"));
		FileWriter fw = new FileWriter("C:/Users/Farnoosh/Desktop/C-large.out");*/
		
		int N = new Integer(in.readLine());
		
			
		//System.out.print(N);
		 for (int cases = 1; cases <= N; cases++) {
			int count = 0;
			String[] ss = in.readLine().split(" ");
			
			int A = Integer.parseInt(ss[0]);
			int B = Integer.parseInt(ss[1]);
			
			
			for(int num = A ; num <= B ; num++){
				int num2 = 0;
				int len = (int)Math.pow(10, Integer.toString(num).length()-1);
				
				int i = 0;
				int num1 = num;
				for(i = 1; i < Integer.toString(num).length() ; i++){
					
					if(Integer.toString(num2).length() == Integer.toString(num1).length() || num2==0){
						num2 = 10 * (num1 % len) + (num1 / len);
					}
					else{
						num2 = num2 * 10;
					}
				
				    if(num2 == num)
				    	break;
					
					if (num2 <= B && num2 > num){
						count++;
					}// end of if
					num1 = num2;
				}//end of for
				

			}//end of for
					
			fw.write ("Case #" + cases + ": " + count + "\n");
		} 
		

		fw.flush();
		fw.close();
	}

}