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();
    }
}

package google.solver;

import google.loader.ChallengeLoader;
import google.loader.ChallengeReader;

import java.io.FileInputStream;
import java.util.Properties;

public class Solver implements ChallengeConstants{

	private ChallengeReader reader;
	private String inputFileName;
	private String result;
	private final String path;

	public Solver(String aPath) {
		this.path = aPath;
		init();
		solve();
		writeResult();
	}

	private void solve() {
		ChallengeLoader loader = new ChallengeLoader(reader);
		loader.load(inputFileName);
		result = loader.getResult();
	}

	private void init() {
		try{
			String propFileName = path+DELIMITER+CHALLENGE_DEFINITION;
			Properties properties = new Properties();
			properties.load(new FileInputStream(propFileName));
			inputFileName = path+DELIMITER+(String)properties.get("fileName");
			String readerClassName = (String)properties.get("readerClassName");
			reader = (ChallengeReader) Class.forName(readerClassName).newInstance();
		}
		catch(Exception e){
			throw new RuntimeException(e);
		}
	}

	public String getResult(){
		return result;
	}


	public void writeResult(){
		String result = getResult();
		write(result);
	}


	private void write(String text) {
		ProblemPackageCreator.write(getResultFileName(), text);
	}
	
	private String getResultFileName() {
		return inputFileName+".result";
	}

	public static void main(String[] args) {
		String problem = CHALLENGE_NAME;
		String path = BASE_DIR+DELIMITER+problem;
		Solver solver = new Solver(path);
		String result = solver.getResult();
		System.out.println(result);
	}
}
