package qual;

import java.util.Scanner;

public class RecycledNumbers {

	public static void main(String[] args) {
		new RecycledNumbers().run();

	}

	private void run() {
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int t = 0; t < T; t++) {
			int A = sc.nextInt();
			int B = sc.nextInt();
			int result = solve(A, B);
			System.out.printf("Case #%d: %d\n", t + 1, result);
		}
	}

	public int solve(int A, int B) {
		int result = 0;
		for (int i = A; i <= B; i++) {
			int dig = (int) Math.log10(A/*same as B*/) + 1;
			int aa = i;
			for (int d = 0; d < dig - 1; d++) {
				aa = (aa % 10) * (int)Math.pow(10, dig - 1) + (aa / 10);
				if (i == aa) {
					break;
				}
				if (i < aa && aa <= B) {
//					System.out.printf("(%d, %d) ", i, aa);
					result++;
				}
			}
		}
		return result;
	}

}

import java.util.*;
import java.io.*;
import java.math.*;
import java.awt.*;
import static java.lang.Math.*;
import static java.lang.Integer.parseInt;
import static java.lang.Double.parseDouble;
import static java.lang.Long.parseLong;
import static java.lang.System.*;
import static java.util.Arrays.*;
import static java.util.Collection.*;

public class C
{
    public static void main(String[] args) throws IOException
    {
        BufferedReader br = new BufferedReader(new InputStreamReader(in));
        int T = parseInt(br.readLine());
        for(int t = 0; t++ < T; )
        {
            String[] line = br.readLine().split(" ");
            int A = parseInt(line[0]), B = parseInt(line[1]);
            long[] V = new long[B - A + 1], S = new long[B - A + 1];
            int order = 1;
            S[0] = V[0] = 0;
            while(order < B) order *= 10;
            
            for(int i = A + 1; i <= B; i++)
            {
                int index = -1;
                for(int j = 10; j <= i; j *= 10)
                {
                    int count = i / j + (i % j) * (order / j);
                    if(index < count && count < i)
                        index = count;
                }
                V[i - A] = index >= A ? V[index - A] + 1 : 0;
                S[i - A] = V[i - A] + S[i - A - 1];
            }
            out.println("Case #" + t +": " + S[B-A]) ; 
        }
    }
}
