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

public class C {

    void solve() throws IOException {
        in("C-large.in"); out("C-large.out");

        long tm = System.currentTimeMillis();
        boolean[] mask = new boolean[2000000];
        int[] r = new int[10];
        int t = readInt();
        for (int cs = 1; cs <= t; ++cs) {
            int a = readInt();
            int b = readInt();
            int ans = 0;
            for (int m = a + 1; m <= b; ++m) {
                char[] d = String.valueOf(m).toCharArray();
                int c = 0;
                for (int i = 1; i < d.length; ++i) {
                    if (d[i] != '0' && d[i] <= d[0]) {
                        int n = 0;
                        for (int j = 0; j < d.length; ++j) {
                            int jj = i + j;
                            if (jj >= d.length) jj -= d.length;
                            n = n * 10 + (d[jj] - '0');
                        }
                        if (n >= a && n < m && !mask[n]) {
                            ++ans;
                            mask[n] = true;
                            r[c++] = n;
                        }
                    }
                }
                for (int i = 0; i < c; ++i) {
                    mask[r[i]] = false;
                }
            }
            println("Case #" + cs + ": " + ans);
            //System.out.println(cs);
        }
        System.out.println("time: " + (System.currentTimeMillis() - tm));
        exit();
    }

    void in(String name) throws IOException {
        if (name.equals("__std")) {
            in = new BufferedReader(new InputStreamReader(System.in));
        } else {
            in = new BufferedReader(new FileReader(name));
        }
    }

    void out(String name) throws IOException {
        if (name.equals("__std")) {
            out = new PrintWriter(System.out);
        } else {
            out = new PrintWriter(name);
        }
    }

    void exit() {
        out.close();
        System.exit(0);
    }

    int readInt() throws IOException {
        return Integer.parseInt(readToken());
    }

    long readLong() throws IOException {
        return Long.parseLong(readToken());
    }

    double readDouble() throws IOException {
        return Double.parseDouble(readToken());
    }

    String readLine() throws IOException {
        st = null;
        return in.readLine();
    }

    String readToken() throws IOException {
        while (st == null || !st.hasMoreTokens()) {
            st = new StringTokenizer(in.readLine());
        }
        return st.nextToken();
    }

    boolean eof() throws IOException {
        return !in.ready();
    }

    void print(String format, Object ... args) {
        out.println(new Formatter(Locale.US).format(format, args));
    }

    void println(String format, Object ... args) {
        out.println(new Formatter(Locale.US).format(format, args));
    }

    void print(Object value) {
        out.print(value);
    }

    void println(Object value) {
        out.println(value);
    }

    void println() {
        out.println();
    }

    StringTokenizer st;

    BufferedReader in;
    PrintWriter out;

    public static void main(String[] args) throws IOException {
        new C().solve();
    }
}

import java.io.*;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class C {
    public static void main(String[] args) throws FileNotFoundException {
        Scanner scanner = new Scanner(new File("c1.in"));
        PrintStream outputStream = new PrintStream(new FileOutputStream("c.out"));
//        PrintStream outputStream = System.out;
        int n = scanner.nextInt();
//        System.out.println(n);

        for (int i = 0; i < n; i++) {
            int a = scanner.nextInt();
            int b = scanner.nextInt();
            outputStream.println("Case #" + (i+1) + ": " + ile(a, b));
        }
    }

    private static int ile(int a, int b) {
        int para = 0;
        int ilenie = 0;

        int next = a;

        while (next <= b) {
            String now = String.valueOf(next);

//            if (!uzyte.contains(now)) {
                int przed = para;
            Set<String> uzyte = new HashSet<String>();
            for (int i = 0; i < ilecyfr(next)-1; i++) {
                    now = rotuj(now);
                    int nowInt = Integer.valueOf(now);
//                    if (ilecyfr(next) != ilecyfr(nowInt)) {
//                        continue;
//                    }

                    if (nowInt >= a && nowInt <= b && nowInt != next && !uzyte.contains(now)) {
//                        if (now > next) {
//                            System.out.println("hehe " + now + " " + next);
//                        }

//                        System.out.println(next + " " + now);
                        para++;
                        uzyte.add(now);
                    }
                }
                if (przed == para) {
                    ilenie++;
//                    System.out.println(next);

                }
//            } else {
//                System.out.println(now + " used");
//            }
            next++;
        }
//        System.out.println(ilenie);
//        return b - a - ilenie;
        return para / 2;
    }

    private static String rotuj(String n) {
        String s = String.valueOf(n);
        String substring = s.substring(1);
        return substring + s.charAt(0);

//        int len = ilecyfr(n);
//        int reszta = n %10;
//        n/=10;
//        return (int) (n + (reszta * Math.pow(10, len - 1)));
    }

    private static int ilecyfr(int n) {
        int ile = 0;
        while (n > 0) {
            ile++;
            n/=10;
        }
        return ile;
    }
}
