import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
import java.io.*;
import java.util.ArrayList;
import java.util.List;

public class Problem_C {
    public static void main(String[] args) throws IOException
            {

                String fileName = "C-large.in";
                FileReader reader = new FileReader(fileName);
                LineNumberReader lnreader = new LineNumberReader(reader);
                FileWriter writer = new FileWriter("output-C-large.txt");
                PrintWriter out = new PrintWriter(writer);
                
                String line = ""; 
                line = lnreader.readLine();
                String line_array[];
                int A;
                int B;
                int length;
                int recycled;
                int count = 0;
				List<Integer> rec_list = new ArrayList<Integer>();
                int index = 0;

                while ((line = lnreader.readLine()) != null){
                    count = 0;
                    line_array = line.split(" ");
                    length = line_array[0].length();
					rec_list.clear();
                    A = Integer.parseInt(line_array[0]);
                    B = Integer.parseInt(line_array[1]);
                    for (int k=A;k<B;k++){
                        recycled = k;
						rec_list.clear();
                        for (int j=1;j<length;j++){
                            recycled = recycle(recycled,length);
                            if ((recycled > k) && (recycled <= B)){
                                if (!rec_list.contains(recycled)){
                                    count++;
                                    rec_list.add(recycled);
                                }
                            }
                        }
                    }

                    out.println("Case #" + (lnreader.
                    getLineNumber()-1) + ": " + count);
                }
                out.close();

            }

            private static  int recycle(int a,int length){
                int r = a%10;
                int q = a/10;
                r = r * (int)java.lang.Math.pow(10,length-1);
                return (r+q);
            }
}

