package qual;

import java.util.Scanner;

public class RecycledNumbers {

	public static void main(String[] args) {
		new RecycledNumbers().run();

	}

	private void run() {
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int t = 0; t < T; t++) {
			int A = sc.nextInt();
			int B = sc.nextInt();
			int result = solve(A, B);
			System.out.printf("Case #%d: %d\n", t + 1, result);
		}
	}

	public int solve(int A, int B) {
		int result = 0;
		for (int i = A; i <= B; i++) {
			int dig = (int) Math.log10(A/*same as B*/) + 1;
			int aa = i;
			for (int d = 0; d < dig - 1; d++) {
				aa = (aa % 10) * (int)Math.pow(10, dig - 1) + (aa / 10);
				if (i == aa) {
					break;
				}
				if (i < aa && aa <= B) {
//					System.out.printf("(%d, %d) ", i, aa);
					result++;
				}
			}
		}
		return result;
	}

}

import java.util.*;

class c
{
	public static void main(String [] args)
	{
		Scanner in = new Scanner(System.in);
		int T = in.nextInt();
		for(int t=1;t<=T;++t)
		{
			int a,b;
			a = in.nextInt();
			b = in.nextInt();
			long pairs = 0;
			for(int i=a;i<=b;++i)
			{
				HashSet<Integer> m = new HashSet<Integer>();
				String istr = "" + i;
				int numDigits = istr.length();
				for(int j=1;j<numDigits;++j)
				{
					String backend = istr.substring(j);
					String frontend = istr.substring(0,j);
					String newstr = backend+frontend;
					int newnum = Integer.parseInt(newstr);
					if(newnum > i && newnum <= b)
					{
						if(!m.contains(newnum))
						{
							++pairs;
							m.add(newnum);
						}
					}
				}
			}
			
			System.out.println("Case #"+t+": " + pairs);
		}
	}
}
