/*
 * 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.*;

public class C
{
	public static void main(String[] args) throws IOException
	{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int T = Integer.parseInt(br.readLine());	
		
		String[] line;
		for(int i=1;i<=T;i++)
		{
			line = br.readLine().split("\\W+");
			int a = Integer.parseInt(line[0]);
			int b = Integer.parseInt(line[1]);
			System.out.println("Case #"+i+": "+recycled(a,b));
		}
	}
	
	public static long recycled(int a,int b)
	{
		long ret = 0;
		for(int i=a;i<b;i++)
		{
			int temp = i;
			int len = 0;
			int p;
			for(p = 1;temp/p!=0;p*=10)len++;
			
			p = p/10;
			int in = 10;
//			System.out.println(i+" length "+len);
			for(int j=1;j<len;j++, in *= 10)
			{
				int r  = temp%in;
				int l  = temp/in;
				int n  = (r*10*p)/in;
				n  += l;
				if(n<=i || n<a || n > b) continue;
				//System.out.println(i+" "+n);
				ret++;
			}
		}
		return ret;
	}	
}
