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.*;

public class RecycledNumbers {

	public static void main(String[] args) throws IOException {
		BufferedReader bfr = new BufferedReader(
				new InputStreamReader(System.in));
		PrintWriter pr = new PrintWriter(System.out);
		int n = Integer.parseInt(bfr.readLine());
		for (int i = 1; i <= n; i++) {
			String input[] = bfr.readLine().split(" ");
			int max = Integer.parseInt(input[1]);
			int count = 0;
			int min = Integer.parseInt(input[0]);
			for (; min < max; min++) {
				String moved = String.valueOf(min).charAt(
						String.valueOf(min).length() - 1)
						+ String.valueOf(min).substring(0,
								String.valueOf(min).length() - 1);
				if (Integer.parseInt(moved) <= max
						&& Integer.parseInt(moved) > min)
					count++;
				while (Integer.parseInt(moved) != min) {
					moved = moved.charAt(moved.length() - 1)
							+ moved.substring(0, moved.length() - 1);
					if (Integer.parseInt(moved) <= max
							&& Integer.parseInt(moved) > min)
						count++;
				}
			}
			pr.printf("Case #%d: %d\n", i, count);
			pr.flush();
		}
	}
}
