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 static java.util.Arrays.deepToString;

import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Scanner;

public class QC {

	public static void main(String[] args) throws Exception 
	{
		new QC().run();
		
	}

	int calculateDigit(int num)
	{
		int res = 0;
		
		while(num>0)
		{
			res++;
			num = num/10;
		}
		
		return res;
	}
	
	void run() throws Exception 
	{
		//Scanner sc = new Scanner(System.in);
		//PrintWriter pw = new PrintWriter(System.out);
		
		Scanner sc = new Scanner(new FileReader("C-large.in"));
		
		FileWriter fstream = new FileWriter("out.in");
		BufferedWriter out = new BufferedWriter(fstream);

		int ntest = Integer.valueOf(sc.nextLine());
		
		
		
		for(int test=1;test<=ntest;++test) 
		{
			int min = sc.nextInt();
			int max = sc.nextInt();
			int score = 0;

			for(int i=min; i<=max; i++)
			{
				int digit = calculateDigit(i);
				List<Integer> list = new ArrayList<Integer>();
				for(int j=1; j<digit; j++)
				{
					
					int head = (int) (i/(Math.pow(10, j)));
					int tail = (int) (i%(Math.pow(10, j)));
					
					int mix = (int) (tail*Math.pow(10,(digit-j)) + head);
					//debug(i+ " " +head+" "+tail);
					if(list.indexOf(mix) == -1 && mix <= max && mix > i && calculateDigit(mix) == calculateDigit(i))
					{
						//debug(i + " " +mix);
						list.add(mix);
						score++;
					}
				}
				
			}
		
			out.write("Case #" + test + ": ");
			out.write(score+"");
			debug(score);
			out.write("\n");
		}
		out.close();
		sc.close();
	
	}
	
	void debug(Object...os) 
	{
		System.err.println(deepToString(os));
	} 
	
	void debugArray(Object[]...os) 
	{
		System.err.println(deepToString(os));
	} 
}
