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.*;
import java.util.*;

public class Main {
    public static void main(String[] args) throws IOException {
        Scanner in = new Scanner(new FileReader("C-large.in"));
        PrintWriter out = new PrintWriter(new FileWriter("RecycledNumbers-Large.out"));

        RecycledNumbers solver = new RecycledNumbers();
        int testCases = in.nextInt();
        for (int i = 1; i <= testCases; ++i) {
            solver.solve(i, in, out);
        }

        in.close();
        out.close();
    }
}

class RecycledNumbers {
    int numberOfRecycledPairs(int A, int B) {
        int res = 0;
        boolean[] seen = new boolean[B + 1];
        for (int i = A; i <= B; ++i) {
            if (seen[i]) continue;
            int pairs = 0;
            char[] S = String.valueOf(i).toCharArray();
            for (int j = 0; j < S.length; ++j) {
                if (S[j] == '0') continue;
                int m = 0;
                for (int k = j; k < S.length; ++k) m = m * 10 + S[k] - '0';
                for (int k = 0; k < j; ++k) m = m * 10 + S[k] - '0';
                if (A <= m && m <= B && !seen[m]) {
                    seen[m] = true;
                    ++pairs;
                }
            }
            res += pairs * (pairs - 1) / 2;
        }
        return res;
    }

    public void solve(int testNumber, Scanner in, PrintWriter out) {
        int A = in.nextInt();
        int B = in.nextInt();

        out.println("Case #" + testNumber + ": " + numberOfRecycledPairs(A, B));
    }
}
