import java.util.*;
import java.lang.*;
import java.math.*;
import java.io.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class C{
	Scanner sc=new Scanner(System.in);

	int INF=1<<28;
	double EPS=1e-9;

	int caze, T;
	int A, B;

	void run(){
		T=sc.nextInt();
		for(caze=1; caze<=T; caze++){
			A=sc.nextInt();
			B=sc.nextInt();
			solve();
		}
	}

	void solve(){
		int ans=0;
		for(int n=A; n<=B; n++){
			int digit=(int)(log10(n)+EPS);
			int d=(int)pow(10, digit);
			// debug("n", n);
			for(int m=rot(n, d); m!=n; m=rot(m, d)){
				// debug("m", m);
				if(n<m&&m<=B){
					ans++;
				}
			}
		}
		answer(ans+"");
	}

	int rot(int n, int d){
		return n/10+n%10*d;
	}

	void answer(String s){
		println("Case #"+caze+": "+s);
	}

	void println(String s){
		System.out.println(s);
	}

	void print(String s){
		System.out.print(s);
	}

	void debug(Object... os){
		System.err.println(deepToString(os));
	}

	public static void main(String[] args){
		try{
			System.setIn(new FileInputStream("dat/C-small.in"));
			System.setOut(new PrintStream(new FileOutputStream("dat/C-small.out")));
		}catch(Exception e){}
		new C().run();
		System.out.flush();
		System.out.close();
	}
}

package recyclednumbers.util;

import java.io.*;
import java.util.ArrayList;
import java.util.List;

public class IOUtil {

    public static List<String> readLines(String filename) {

        List<String> lines = new ArrayList<String>();

        try {

            InputStream is = IOUtil.class.getResourceAsStream("/META-INF/" + filename);

            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String line = null;
            while ((line = br.readLine()) != null) {
                lines.add(line);
            }

            br.close();
            is.close();

            return lines;

        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }

    }

    public static void writeLines(String filename, List<String> lines) {

        try {

            File file = new File("src/META-INF/" + filename);

            FileWriter fileWriter = new FileWriter(file);

            for (int i = 0; i < lines.size(); i++) {
                fileWriter.write("Case #" + (i + 1) + ": " + lines.get(i) + "\n");
            }

            fileWriter.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}