package Main;

import com.sun.deploy.util.ArrayUtil;
import org.apache.commons.lang3.ArrayUtils;

import java.io.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;

/**
 * Created with IntelliJ IDEA.
 * User: arran
 * Date: 14/04/12
 * Time: 3:12 PM
 * To change this template use File | Settings | File Templates.
 */
public class Round {
    public StringBuilder parse(BufferedReader in) throws IOException {
        StringBuilder out = new StringBuilder();
        String lineCount = in.readLine();

        for (int i = 1; i <= Integer.parseInt(lineCount); i++)
        {
            out.append("Case #"+i+": ");
            System.err.println("Case #"+i+": ");
            String line = in.readLine();
            String[] splits = line.split(" ");
            int p1 = Integer.valueOf(splits[0]);
            int p2 = Integer.valueOf(splits[1]);
            int r = pairRecyclable(p1, p2);
            out.append(r);

//            if (i < Integer.parseInt(lineCount))
                out.append("\n");
        }
        return out;
    }

    public static int pairRecyclable(int i1, int i2) {
        HashSet<String> hash = new HashSet<String>();
        for (int i = i1; i < i2; i++)
        {
            String istr = String.valueOf(i);
            if (istr.length() < 2) continue;
            for (int p = 0; p < istr.length() ; p++)
            {
                String nistr = istr.substring(p,istr.length()).concat(istr.substring(0,p));
                if (Integer.valueOf(nistr) < i1) continue;
                if (Integer.valueOf(nistr) > i2) continue;
                if (nistr.equals(istr)) continue;
                String cnistr = (Integer.valueOf(nistr) > Integer.valueOf(istr)) ?  istr + "," + nistr : nistr + "," + istr;
                hash.add(cnistr);
            }
        }
        return hash.size();
    }

    public static void main(String[] args) {
        InputStreamReader converter = null;
        try {
            int attempt = 0;
            String quest = "C";
//            String size = "small-attempt";
            String size = "large";
            converter = new InputStreamReader(new FileInputStream("src/resource/"+quest+"-"+size+".in"));
            BufferedReader in = new BufferedReader(converter);
            Round r = new Round();
            String str = r.parse(in).toString();
            System.out.print(str);
            FileOutputStream fos = new FileOutputStream(quest+"-"+size+".out");
            OutputStreamWriter osw = new OutputStreamWriter(fos);
            BufferedWriter bw = new BufferedWriter(osw);
            bw.write(str);
            bw.flush();
            bw.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

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

public class C2012 {
	public static void main(String[] args) throws IOException {
		PrintWriter out;
		BufferedReader f;

		try {
			f = new BufferedReader(new FileReader("C2012.in"));
			out = new PrintWriter(new BufferedWriter(new FileWriter(
					"C2012.out")));
		} catch (Exception e) {
			f = new BufferedReader(new InputStreamReader(System.in));
			out = new PrintWriter(System.out);
		}
		int n=Integer.parseInt(f.readLine());
		for(int i=1;i<=n;i++){
			StringTokenizer token = new StringTokenizer(f.readLine());
			int a=Integer.parseInt(token.nextToken());
			int b=Integer.parseInt(token.nextToken());
			int numDigits=numDigits(a);
			int answer=0;
			int last=0;
			for(int j=a;j<=b;j++){
				int hm=j;
				int hm2=hm;
				int tenmultiply=0;
				for(int k=1;k<numDigits;k++){
					int right=hm2%10;
					if(right==0){
						tenmultiply++;
						hm2/=10;
						continue;
					}
					hm2/=10;
					hm2+=right*Math.pow(10,numDigits-1);
					tenmultiply=0;
					if(hm2<=b&&hm2>hm&&last!=hm2){
						last=hm2;
						answer++;
					}
				}
			}
			out.print("Case #");
			out.print(i+": ");
			out.println(answer);
		}
		out.close();
		System.exit(0);
	}
	public static int numDigits(int x){
		if (x >= 10000) {
	        if (x >= 10000000) {
	            if (x >= 100000000) {
	                if (x >= 1000000000)
	                    return 10;
	                return 9;
	            }
	            return 8;
	        }
	        if (x >= 100000) {
	            if (x >= 1000000)
	                return 7;
	            return 6;
	        }
	        return 5;
	    }
	    if (x >= 100) {
	        if (x >= 1000)
	            return 4;
	        return 3;
	    }
	    if (x >= 10)
	        return 2;
	    return 1;
	}
}