import java.io.FileInputStream;
import java.util.HashMap;
import java.util.Scanner;
import java.util.TreeSet;

// Recycled Numbers
// https://code.google.com/codejam/contest/1460488/dashboard#s=p2

public class C {

	private static String process(Scanner in) {
		int A = in.nextInt();
		int B = in.nextInt();
		int res = 0;
		int len = Integer.toString(A).length();
		for(int n = A; n < B; n++) {
			String str = Integer.toString(n);
			TreeSet<Integer> set = new TreeSet<Integer>();
			for(int i = 1; i < len; i++) {
				int m = Integer.parseInt(str.substring(i, len) + str.substring(0, i));
				if ( m > n && m <= B && ! set.contains(m) ) {
					set.add(m);
					res++;
				}
			}
		}
		return Integer.toString(res);
	}

	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(System.in.available() > 0 ? System.in : 
			new FileInputStream(Thread.currentThread().getStackTrace()[1].getClassName() + ".practice.in"));
		int T = in.nextInt();
		for(int i = 1; i <= T; i++) 
			System.out.format("Case #%d: %s\n", i, process(in));
	}
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class RecycledNumber {

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

		FileInputStream fstream = new FileInputStream("C:\\input.txt");
		DataInputStream in = new DataInputStream(fstream);
		BufferedReader br = new BufferedReader(new InputStreamReader(in));

		int cases = Integer.parseInt(br.readLine());
		String mainOutput = "";

		for (int c = 0; c < cases; c++) {

			StringTokenizer stringTokenizer = new StringTokenizer(br.readLine());

			int a = Integer.parseInt(stringTokenizer.nextToken());
			int b = Integer.parseInt(stringTokenizer.nextToken());
			
			int finalCount = 0;

			int arr[] = new int[b * 2];
			int arr2[] = new int[b * 2];

			for (int n = a; n < b; n++) {

				int TEN = 10;
				int count = Integer.toString(n).length();
				for (int i = 1; i < count; i++) {
					int m = (int) ((n % Math.pow(TEN, i)) * Math.pow(TEN, count
							- i))
							+ (int) (n / Math.pow(TEN, i));
					if (a <= n && n < m && m <= b) {
						// System.out.println(n + " " + m);
						arr[finalCount] = m;
						arr2[finalCount++] = n;
					}
				}
			}
			int count = 0;
			for (int i = 1; i < finalCount; i++) {
				if ((arr2[i] == arr2[i + 1] && arr[i] == arr[i + 1])
						|| (arr2[i - 1] == arr2[i] && arr[i - 1] == arr[i])) {
					count++;
				}
			}
			mainOutput = mainOutput + "Case #"+(c+1)+": "+(finalCount - (count / 2))+"\n";			
		}
		BufferedWriter bw = new BufferedWriter(new FileWriter(new File(
        "C:\\output.txt"), true));
		
		bw.write(mainOutput);
		bw.close();
		
		
		in.close();
	}

}
