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.FileNotFoundException;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Scanner;

public class RecycledNumbers {
	public static void main(String args[]) throws FileNotFoundException {
		new RecycledNumbers().Go();
	}

	public void Go() throws FileNotFoundException {
		Scanner in = new Scanner(new File("test.txt"));
		int tests = Integer.parseInt(in.nextLine());
		for (int i = 0; i < tests; i++) {
			String[] line = in.nextLine().split("\\s+");
			int n = Integer.parseInt(line[0]);
			int m = Integer.parseInt(line[1]);
			System.out.println("Case #" + (i + 1) + ": "
					+ countPairs(n, m, 1, 1000));
		}
	}

	public int countPairs(int n, int m, int A, int B) {
		HashMap<Integer, LinkedList<Integer>> map = new HashMap<Integer, LinkedList<Integer>>();

		int count = 0;
		for (int i = n; i <= m; i++) {

			LinkedList<Integer> intList = permutations(i + "");
			map.put(i, intList);
			for (Integer it : intList) {
				if (map.containsKey(it)) {
					LinkedList<Integer> ints = map.get(it);
					if (ints.contains(i)) {
						count++;
					}
				}
			}
		}
		
		return count;
	}

	public LinkedList<Integer> permutations(String str) {
		LinkedList<Integer> numList = new LinkedList<Integer>();
		for (int i = 0; i < str.length(); i++) {
			Integer temp = Integer.parseInt(str);
			if (!numList.contains(temp))
				numList.add(Integer.parseInt(str));
			str = leftRotate(str);
		}
		numList.removeFirst();
		return numList;
	}

	public String leftRotate(String str) {
		StringBuilder build = new StringBuilder();
		build.append(str.substring(1, str.length()));
		build.append(str.charAt(0));
		return build.toString();
	}
}
