/*
 * 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.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main {
	private static int T = 0;
	public static BufferedReader bufReader;
	public static BufferedWriter bufWriter;
	public static File wFile, rFile;

	private static int tMinLimit = 1;
	private static int tMaxLimit = 50;
	private static String rFilename = "C-small-attempt0.in";
	private static String wFilename = "OUTPUT0.txt";

	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		rFile = new File(rFilename);
		bufReader = new BufferedReader(new InputStreamReader(
				new FileInputStream(rFile), "utf8"));

		wFile = new File(wFilename);// «Ø¥ßÀÉ®×¡A·Ç³Æ¼gÀÉ
		bufWriter = new BufferedWriter(new OutputStreamWriter(
				new FileOutputStream(wFile, false), "utf8"));

		T = Integer.valueOf(bufReader.readLine().trim());
		if (tMinLimit <= T && T <= tMaxLimit) {
			for (int i = 1; i <= T; i++) {
				String[] AB = bufReader.readLine().split(" ");
				new Round1C(i, Integer.parseInt(AB[0]), Integer.parseInt(AB[1]));
			}
		}
		bufWriter.close();
	}

}