package codejam;

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

public class RecycledNumbers {
	public static void main(String[] args) throws IOException {
		BufferedReader in = new BufferedReader(new FileReader("in.txt"));
		PrintWriter out = new PrintWriter(new File("out.txt"));
		
		int T = Integer.parseInt(in.readLine());
		for (int t = 1; t <= T; ++t) {
			String[] parts = in.readLine().split("[ ]+");
			int A = Integer.parseInt(parts[0]);
			int B = Integer.parseInt(parts[1]);
			
			int cnt = 0;
			for (int i = A; i < B; ++i) {
				String str = String.valueOf(i);
				int n = str.length();
				String res = "";
				Set<Integer> seen = new HashSet<Integer>();
				for (int j = n - 1; j > 0; --j) {
					res = str.substring(j) + str.substring(0, j);
					int k = Integer.parseInt(res);
					if (k > i && k <= B) {
						//System.out.println("(" + i + ", " + k + ")");
						if (!seen.contains(k)) {
							++cnt;
							seen.add(k);
						}
					}
				}
			}

			out.println("Case #" + t + ": " + cnt);
		}
		
		in.close();
		out.close();
		System.exit(0);
	}
}

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;

public class C {

    public static void main(String[] args) throws Exception {
        BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream("c.in")));
        PrintStream out = new PrintStream(new FileOutputStream("c.out"));
        long count = readInt(in);
        for (int i = 0; i < count; i++) {
            String[] data = in.readLine().split(" ");
            int a = Integer.parseInt(data[0]);
            int b = Integer.parseInt(data[1]);
            int ans = 0;
            HashSet<String> st = new HashSet(); 
            for (int k = a; k<=b ; k++) {
                String s = "" + k;
                for (int p = 1; p < s.length(); p++) {
                    if (s.charAt(p) != '0') {
                        int t = Integer.parseInt(s.substring(p) + s.substring(0, p));
                        if (t > k && a<= t && t <=b) {
                            String key = s + t;
                            if (!st.contains(key)) {
                                ans++;
                                System.out.println(k + " " + t);
                                st.add(key);
                            }
                        }
                    }
                }
                        
            }
            out.println("Case #" + (i + 1) + ": " + ans);
        }
        out.flush();
        out.close();

    }

    private static long readInt(BufferedReader in) {
        try {
            return Long.parseLong(in.readLine());
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

}
