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.Scanner;


public class ProblemC {

	public static int rotate(int x) {
		int y = x % 10;
		x /= 10;
		int cd = (x + "").length();
		if (x == 0) {
			cd = 0;
		}
		y *= Math.pow(10, cd);
		y += x;
		return y;
	}
	
	public static String rotate(String x) {
		String r = x.substring(0, 1);
		if (x.length() > 1) {
			r = x.substring(1) + r;
		}
		return r;
	}
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int t = sc.nextInt();
		for (int tt = 1; tt <= t; tt++) {
			int a = sc.nextInt();
			int b = sc.nextInt();
			int c = 0;
			for (int i = a; i <= b; i++) {
				String s = i + "";
				while (true) {
					s = rotate(s);
					int x = Integer.parseInt(s);
					if (x == i) {
						break;
					}
					if (x > i && x >= a && x <= b) {
//						System.out.println(i + " " + x);
						c++;
					}
				}
			}
			System.out.println("Case #" + tt + ": " + c);
		}
	}

}
