import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package gcj2012.qualification_round;

import java.io.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Scanner;

/**
 *
 * @author langlv
 */
public class Dancing {

    private static int countDigit(int num) {
        Integer t = new Integer(num);
        int count = 0;
        while (t != 0) {
            t = t / 10;
            count++;
        }
        return count;
    }

    private static int recycledNumber(int num, int pos) {
        if (num < 10) {
            return 0;
        }
        if (pos > countDigit(num)) {
            return 0;
        }
        String n = String.valueOf(num);
        int res = Integer.parseInt(n.substring(pos) + n.substring(0, pos));

        return res;
    }

    public static void main(String[] args) throws Exception {
//        Scanner sc = new Scanner(System.in);
//        PrintWriter pw = new PrintWriter(System.out);
        Scanner sc = new Scanner(new FileReader("C:\\C-large.in"));
        PrintWriter pw = new PrintWriter(new FileWriter("C:\\C-large.out"));
        try {
            int ntest = Integer.parseInt(sc.nextLine());

            for (int test = 1; test <= ntest; ++test) {
                int A = sc.nextInt();
                int B = sc.nextInt();

                int res = 0;
                List<Integer> num = new ArrayList<Integer>();
                for (int i = A; i <= B; i++) {
                    for (int j = 1; j < countDigit(i); j++) {
                        int rec = recycledNumber(i, j);
                        if (A <= rec && rec <= B && i < rec) {
                            num.add(rec);
                            res++;
                        }
                    }
                }

                pw.print("Case #" + test + ": ");
                pw.print(res);
                pw.println();
            }
        } catch (Exception e) {
            System.err.println(e.getMessage());
            e.printStackTrace();
        } finally {
            pw.close();
            sc.close();
        }
    }
}
