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.StringTokenizer;

public class RecycledNumbers {
    static class MyScanner {
        BufferedReader br;
        StringTokenizer st;

        public MyScanner(String fileName) throws IOException {
            br = new BufferedReader(new FileReader(new File(fileName)));
        }

        public String nextToken() throws IOException, NullPointerException {
            while (st == null || !st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
            return st.nextToken();
        }

        public String nextString() throws IOException, NullPointerException {
            st = null;
            return br.readLine();
        }

        public Integer nextInt() throws IOException {
            return Integer.parseInt(nextToken());
        }

        void close() throws IOException {
            br.close();
        }
    }

    public static void main(String[] args) throws IOException {
        final String name = "C-large";
        MyScanner in = new MyScanner(name + ".in");
        PrintWriter out = new PrintWriter(name + ".txt");

        int t = in.nextInt();
        for (int i = 1; i <= t; i++) {
            int a = in.nextInt();
            int b = in.nextInt();
            int res = 0;
            for (int n = a; n < b; n++) {
                int m = n;
                int l = 0;
                int k = 1;
                while (m != 0) {
                    m /= 10;
                    l++;
                    k *= 10;
                }
                m = n;
                k /= 10;
                int[] w = new int[l];
                for (int j = 1; j < l; j++) {
                    m = (m % 10) * k + m / 10;
                    w[j] = m;
                    boolean f = true;
                    for (int q = 1; q < j; q++) {
                        if (m == w[q]) {
                            f = false;
                            continue;
                        }
                    }
                    if (m > n && a <= m && m <= b && f) {
                        res++;
                    }
                }
            }
            out.println("Case #" + i + ": " + res);
        }

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

