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.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) throws IOException {

        String filename = "C:\\Users\\irene\\Desktop\\input.txt";
        List<String> inputLines = readInput(filename);
        int i = 0;
        for (String line : inputLines) {
            String[] limits = line.split("\\s+");
            RecycledNumbers rn = new RecycledNumbers(Integer.parseInt(limits[0]), Integer.parseInt(limits[1]));
            int result = rn.getDistinctPairsCount();
            System.out.print("Case #" + (i + 1) + ": " + result);
            System.out.println();
            i++;
        }
    }

    private static List<String> readInput(String filename) throws IOException {
        BufferedReader in
                = new BufferedReader(new FileReader(filename));

        Integer totalLines = Integer.parseInt(in.readLine());
        ArrayList<String> lines = new ArrayList<String>(totalLines);
        for (int i = 0; i < totalLines; i++) {
            lines.add(in.readLine());
        }
        return lines;
    }
}
