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.*;

public class QualificationRoundC {
    public static int power(int i, int p){
        int k = 1;
        for(int j = 0; j < p; j++)
            k *= i;
        return k;
    }
    public static int recycle(int n, int k){
        int d = power(10, k);
        int e = power(10, numDigits(n) - k);
        int right = n % d;
        int left = n / d;
        return right * e + left;
    }
    public static int numDigits(int n){
        int i = 1, k = 0;
        while(n / i > 0){
            i *= 10;
            k++;
        }
        return k;
    }
    public static Set<Integer> getRecycledNumbers(int n){
        int digits = numDigits(n);
        Set<Integer> recycled = new HashSet<Integer>(digits - 1);
        for(int i = 0; i < digits; i++){
            int m = recycle(n, i);
            recycled.add(m);
        }
        return recycled;
    }
    public static void main(String[] args) throws IOException {
        String inFile = args[0];
        String outFile = args[0].replaceAll("\\.in$", ".out");

        FileInputStream fileInputStream = new FileInputStream(inFile);
        Scanner scanner = new Scanner(fileInputStream);
        FileWriter fileWriter = new FileWriter(outFile);
        BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);

        int cases = scanner.nextInt();

        for(int i = 1; i <= cases; i++){
            int A = scanner.nextInt(), B = scanner.nextInt();
            int count = 0;

            for(int n = A; n < B; n++){
                Set<Integer> recycled = getRecycledNumbers(n);
                Iterator<Integer> it = recycled.iterator();
                while(it.hasNext()){
                    int m = it.next();
                    if(n < m && m <= B)
                        count++;
                }
            }

            String answer = String.format("Case #%d: %d\n", i, count);
            System.out.print(answer);
            bufferedWriter.write(answer);
        }

        bufferedWriter.close();
        fileWriter.close();
        scanner.close();
        fileInputStream.close();

    }
}
