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();
    }
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package numbers;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 *
 * @author Serban
 */
public class Input {

    PrintWriter out;

    public Input(String fileName) {
        //C-large-practice.in
        try {
            out = new PrintWriter(new File("result.txt"));
            Scanner scan = new Scanner(new File(fileName));
            int T = scan.nextInt();
            scan.nextLine();
            for (int i = 0; i < T; i++) {
                int A = scan.nextInt();
                int B = scan.nextInt();
                solve(A, B, digits(A), i);
            }
            out.close();
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }

    private void solve(int A, int B, int digits, int testCase) {
        out.print("Case #" + (testCase + 1) + ": ");
        int nr = 0;
        int n = (int) Math.pow(10, digits);

        if (A >= 10) {
            for (int i = A; i < n; i++) {
                int m = reverse(i, digits);
                while (m != i) {
                    if (i < m && m <= B) {
                        nr++;
                    }
                    m = reverse(m, digits);
                }
            }
        }
        System.out.println(nr);
        out.print(nr);
        out.println();
        out.flush();
    }

    private int digits(int nr) {
        int digits = 0;
        while (nr > 0) {
            nr /= 10;
            digits++;
        }
        return digits;
    }

    private int reverse(int nr, int digits) {
        int last = 0;
        while (last == 0) {
            last = nr % 10;
            nr = nr / 10;
        }
        nr = last * (int) Math.pow(10, digits - 1) + nr;
        return nr;
    }
}
