/*
 * 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.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.StringTokenizer;

public class RecycledNumbers {

	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub

		BufferedReader f = new BufferedReader(new FileReader("test.in"));
		PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("recycled.out")));
		
		int numberCases = Integer.parseInt(f.readLine());
		String log;
		StringTokenizer st;
		int lower;
		int upper;
		int pairs;
		
		for (int i = 1; i <= numberCases; i++)
		{
			log = "Case #" + i + ": ";
			st = new StringTokenizer(f.readLine());
			lower = Integer.parseInt(st.nextToken());
			upper = Integer.parseInt(st.nextToken());
			pairs = calculatePairs(lower,upper);
			
			out.println(log + pairs);
		}
		
		out.close();
		System.exit(0);
	}

	private static int calculatePairs(int lower, int upper) {
		
		String baseString;
		int base;
		String tempString;
		int temp;
		int pairs = 0;
		HashSet<String> h = new HashSet<String>();
		
		//i = n
		for (int i = lower; i <= upper; i++)
		{
			base = i;
			baseString = Integer.toString(base);
			h.clear();
			
			//j = number of digits to swap
			//if leading 0, then automatically smaller/not valid
			for (int j = 1; j < baseString.length(); j++)
			{
				tempString = baseString;
				tempString = shiftDigits(tempString, j);
				temp = Integer.parseInt(tempString);
				
				if ((temp > base) &&
						(temp <= upper))
				{
					if (!h.contains(tempString))
					{
						h.add(tempString);
						pairs++;
					}
				}
			}
		}
		
		return pairs;
	}

	private static String shiftDigits(String temp, int n) 
	{
		return temp.substring(temp.length() - n) + temp.substring(0, temp.length() - n);
	}

}
