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();
    }
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;

public abstract class FileWrapper {

	protected static final String CASE = "Case #";
	protected static final String OUTPUT = "result.out";
	protected int caseNum = 0;
	protected String output[] = null;
	private FileReader fr = null;
	private BufferedReader br = null;
	private FileWriter fw = null;
	private BufferedWriter bw = null;

	protected void openReadFile(String fileName) throws Exception {
		this.fr = new FileReader(fileName);
		this.br = new BufferedReader(this.fr);
	}

	protected void closeReadFile() throws Exception {
		this.br.close();
		this.fr.close();
	}

	protected String readLine() throws Exception {
		return this.br.readLine();
	}
	
	protected boolean isFileReady() throws Exception {
		return this.br.ready();
	}
	
	protected abstract void processInput(String fileName);
	
	private void openWriteFile(String fileName) throws Exception {
		this.fw = new FileWriter(fileName);
		this.bw = new BufferedWriter(this.fw);
	}

	private void closeWriteFile() throws Exception {
		this.bw.close();
		this.fw.close();
	}

	private void writeLine(String line) throws Exception {
		this.bw.write(line);
		this.bw.newLine();
	}
	
	protected void processOutput(String fileName) {
		try{
			this.openWriteFile(fileName);
			for (int i=0; i<this.caseNum; i++) {
				this.writeLine(this.output[i]);
			}
			this.closeWriteFile();
		}catch(Exception e){}
	}
	
	protected abstract void calculate();

}