import java.util.HashSet;
import java.util.Scanner;

public class C {

	static HashSet p = new HashSet();
	static int low;
	static int high;
	int count = 0;

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int no = sc.nextInt();

		for (int i = 1; i <= no; i++) {

			p.clear();
			low = sc.nextInt();
			high = sc.nextInt();

			for (int l = low; l <= high; l++) {
				recycle(l);
			}
			System.out.println("Case #" + i + ": " + p.size());

		}
	}

	public static void recycle(int no) {

		String s = Integer.toString(no);
		for (int i = 0; i < s.length(); i++) {
			String rec = s.substring(i) + s.substring(0, i);
			int r = Integer.parseInt(rec);
			if (r != no && r >= low && r <= high) {
				int min = Math.min(r, no);
				int max = Math.max(r, no);
				String a = Integer.toString(min) + "" + Integer.toString(max);
				p.add(a);

			}
		}

	}
}

import java.io.*;
import java.math.*;
import java.util.*;
import java.text.*;

public class c {
    public static void main(String[] args) {
        Scanner sc = new Scanner(new BufferedInputStream(System.in));

        int[] next = new int[10000000];
        int low = 1;
        int high = 10;
        for (int digits = 1; digits <= 7; ++digits) {
            for (int i = low; i < high; ++i) {
                int a = 0;
                int b = i;
                while (a == 0) {
                    a = b % 10;
                    b = b / 10;
                }

                next[i] = low * a + b;
            }
            low = low * 10;
            high = high * 10;
        }

        int T = sc.nextInt();

        for (int casenumber = 1; casenumber <= T; ++casenumber) {

            int a = sc.nextInt();
            int b = sc.nextInt();

            int count = 0;

            for (int i = a; i <= b; ++i) {
                int count0 = 1;
                int j = next[i];
                while (j != i) {
                    if (j >= a && j <= b)
                        ++count0;
                    j = next[j];
                }

                count += (count0 - 1);

            }
            
            count /= 2;

            System.out.format("Case #%d: %d%n", casenumber, count);
        }
    }
}
