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){}
	}
}
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;


public class ProblemC {

//	private static String inputFile = "input.txt";
//	private static String inputFile = "C-small-attempt0.in";
	private static String inputFile = "C-large.in";

	public static void main(String[] args) throws IOException {
	    BufferedReader input = null;
		try {
			input =  new BufferedReader(new FileReader(inputFile));

			String line = null;

			int numOfTestCases = 0;
			if ((line = input.readLine()) != null) {
				numOfTestCases = Integer.parseInt(line.trim());
			}

			for (int i = 1; i <= numOfTestCases; i++) {
				if ((line = input.readLine()) != null) {
					String ab = line;
					String[] ab_array = ab.split(" ");
					int a = Integer.parseInt(ab_array[0]);
					int b = Integer.parseInt(ab_array[1]);

					if (a<10 && b<10) {
						System.out.println("Case #" + i + ": 0");
					} else {
						Set<String> recycled = new HashSet<String>();

						if (a < 10) {
							a = 10;
						}
						for (int n=a; n<b; n++) {
							String n_string = "" + n;
							int length = n_string.length();
							for (int j=1; j<length; j++) {
								String m_string = n_string.substring(j) + n_string.substring(0, j);
								int m = Integer.parseInt(m_string);
								if (m>n && m<=b) {
									recycled.add(n_string + ", " + m_string);
								}
							}
						}
						System.out.println("Case #" + i + ": " + recycled.size());
					}
				} else {
					System.out.println("ERROR: Could not read the test case #" + i);
				}
			}
		} catch (FileNotFoundException e) {
			System.out.println("ERROR: FileNotFoundException for the input file.");
			e.printStackTrace();
		} finally {
	        input.close();
		}
	}

}
