import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class RecycleSolution {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		String inFilename = "C-large.in";
		String outFilename = inFilename.substring(0, inFilename.length() - 3)
				+ ".out";
		try {
			Scanner sc = new Scanner(new File(inFilename));
			PrintStream ps = new PrintStream(new FileOutputStream(outFilename));
			int testCases = Integer.parseInt(sc.nextLine());
			for (int i = 1; i <= testCases; i++) {
				// logic
				if (i >= 1) {
					ps.println();
				}
				String data = sc.nextLine();
				String[] parts = data.split(" ");
				int min = Integer.parseInt(parts[0], 10);
				int max = Integer.parseInt(parts[1], 10);
				int pairCount = 0;
				for (int test = min; test < max; test++) {
					List<Integer> orderings = orderingsOf(test);
					for (int ordering : orderings) {
						if (ordering > test && ordering <= max) {
							pairCount++;
						}
					}
				}
				System.out.println("Case #" + i + ": " + pairCount);
				ps.print("Case #" + i + ": " + pairCount);
			}
			sc.close();
			ps.close();
		} catch (Exception ex) {
			ex.printStackTrace();
		}

	}

	public static List<Integer> orderingsOf(int number) {
		List<Integer> myOrderings = new ArrayList<Integer>();
		String base = "" + number;
		int baselen = base.length();
		for (int i = 0; i < baselen; i++) {
			String thisperm = base.substring(baselen - i);
			if (baselen - i > 0) {
				thisperm += base.substring(0, baselen - i);
			}
			// Strip out 0-starting
			int tplen = ("" + Integer.parseInt(thisperm, 10)).length();
			if (tplen == baselen)
				myOrderings.add(Integer.parseInt(thisperm, 10));
		}
		return myOrderings;
	}

}
