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 numbers;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 *
 * @author Serban
 */
public class Input {

    PrintWriter out;

    public Input(String fileName) {
        //C-large-practice.in
        try {
            out = new PrintWriter(new File("result.txt"));
            Scanner scan = new Scanner(new File(fileName));
            int T = scan.nextInt();
            scan.nextLine();
            for (int i = 0; i < T; i++) {
                int A = scan.nextInt();
                int B = scan.nextInt();
                solve(A, B, digits(A), i);
            }
            out.close();
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }

    private void solve(int A, int B, int digits, int testCase) {
        out.print("Case #" + (testCase + 1) + ": ");
        int nr = 0;
        int n = (int) Math.pow(10, digits);

        if (A >= 10) {
            for (int i = A; i < n; i++) {
                int m = reverse(i, digits);
                while (m != i) {
                    if (i < m && m <= B) {
                        nr++;
                    }
                    m = reverse(m, digits);
                }
            }
        }
        System.out.println(nr);
        out.print(nr);
        out.println();
        out.flush();
    }

    private int digits(int nr) {
        int digits = 0;
        while (nr > 0) {
            nr /= 10;
            digits++;
        }
        return digits;
    }

    private int reverse(int nr, int digits) {
        int last = 0;
        while (last == 0) {
            last = nr % 10;
            nr = nr / 10;
        }
        nr = last * (int) Math.pow(10, digits - 1) + nr;
        return nr;
    }
}
