/*
 * 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.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;


public class Main {
	public static void main(String[] args) throws IOException {
		FileInputStream fis = new FileInputStream(new File("in.txt"));
		FileOutputStream fos = new FileOutputStream(new File("out.txt"));
		Scanner sc = new Scanner(fis);
		PrintWriter out = new PrintWriter(fos);
		int cases = sc.nextInt();
		for(int cs = 1; cs <= cases; cs++)
		{
			int begin = sc.nextInt();
			int end = sc.nextInt();
			int cnt = 0;
			for(int n=begin; n<=end; n++)
			{
				int weishu = getWeishu(n);
				int cur = getNext(n, weishu);
				while(cur != n)
				{
					if(cur > n && cur <=end && getWeishu(cur) == weishu)
						cnt++;
					cur = getNext(cur, weishu);
				}
			}
			out.println("Case #"+cs+": "+cnt);
		}
		sc.close();
		out.close();
	}
	public static int getNext(int n, int weishu)
	{
		//int weishu= getWeishu(n);
		return n%10*getTens(weishu-1)+n/10;
	}
	private static int getTens(int n) {
		int res = 1;
		for(int i=0; i<n; i++)
			res *= 10;
		return res;
	}
	private static int getWeishu(int n) {
		int weishu = 1;
		int nweishu = 10;
		while(n >= nweishu)
		{
			nweishu*=10;
			weishu++;
		}
		return weishu;
	}
}
