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.util.HashSet;
import java.util.Scanner;
import java.util.Set;

/**
 * Google Code Jam 2012
 * 
 * @author 7henick
 */
public class ProblemC {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int T = sc.nextInt();
        sc.nextLine();

        // A <= n < m <= B
        for (int i = 0; i < T; i++) {
            int A = sc.nextInt();
            int B = sc.nextInt();

            int count = 0;

            for (int n = A; n < B; n++) {
                String nString = String.valueOf(n);
                Set<Integer> intSet = new HashSet<Integer>();

                for (int j = 1; j < nString.length(); j++) {
                    char idx = nString.charAt(j);

                    if (idx != '0') {
                        String mString = nString.substring(j)
                                + nString.substring(0, j);
                        int m = Integer.valueOf(mString);

                        if (n < m && m <= B) {
                            intSet.add(m);
                        }
                    }
                }
                count += intSet.size();
            }

            System.out.println("Case #" + (i + 1) + ": " + count);
            if (sc.hasNextLine()) {
                sc.nextLine();
            }
        }
    }

    public static boolean isValid(int n, int m, int B) {
        return n < m && m <= B;
    }
}
