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.FileInputStream;
import java.io.FileNotFoundException;
import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * User: aeg
 * Date: 12/04/14
 * Time: 22:58
 * To change this template use File | Settings | File Templates.
 */
public class ReceycledNumbers {
    public static void main (String[] argc) throws FileNotFoundException {
        ReceycledNumbers  renum = new ReceycledNumbers();
        renum.solve();

    }

    private void solve() throws FileNotFoundException {
        FileInputStream fis = new FileInputStream("csv/QR_C/C-large.in");
        Scanner sc = new Scanner(fis);

        int T = sc.nextInt();

        loop:
        for (int i = 0; i < T; i++) {
            int A = sc.nextInt();
            int B = sc.nextInt();
            int count =0;

            System.out.print("Case #"+(i+1)+": ");
            if (B < 10) {
                System.out.println("0");
                continue;
            }
            for (int j = A; j < B; j++) {
                String str = ((Integer) j).toString();
                count +=tryRecycle(str, j, B);

            }
            System.out.println(count);
        }
      }

    private int tryRecycle(String str, int j, int b) {
        int count=0;
        for(int i=1;i<str.length();i++){
            String s2 = str.substring(str.length()-i,str.length()) + str.substring(0,str.length()-i);
            Integer i2 = Integer.valueOf(s2);
            if ((j < i2) && (i2 <= b)) {
                count++;
            }
        }
        return count;
    }


}
