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.io.PrintWriter;
import java.util.*;

public class main {

    static int numberPeriod(int n, int len) {
        if (len == 2 && n / 10 == n % 10) return 1;
        if (len == 4 && n % 100 == n / 100) return 2;
        if (len == 6 && n % 100 == n / 10000 && n % 100 == n / 100 % 100) return 2;
        if (len == 6 && n % 1000 == n / 1000) return 3;
        return len;
    }

    static int numberLength(int n) {
        int len = 0;
        while (n > 0) {
            n /= 10;
            len++;
        }
        return len;
    }

    public static void main(String[] args) throws FileNotFoundException {
        Scanner sc = new Scanner(new File("C-large.in"));
        PrintWriter out = new PrintWriter("result.txt");
        int tests = sc.nextInt();
        for (int t = 1; t <= tests; t++) {
            int a = sc.nextInt(),
                    b = sc.nextInt(),
                    length = numberLength(a),
                    tt = (int) Math.pow(10, length - 1),
                    res = 0;
            for (int j = a; j <= b; j++) {
                int cur = j;
                int val = j;
                int per = numberPeriod(j, length);
                for (int k = 0; k < per; k++) {
                    int c = val % 10;
                    val = val / 10 + c * tt;
                    if (val > cur && val <= b) {
                        res++;
                    }
                }
            }
            out.printf("Case #%d: %d\n",t,res);
        }
        out.flush();
    }
}