import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;

public class CopyOfCopyOfMain {

	static int ndigits(int n) {
		return (int) (Math.log10(n) + 1);
	}

	static int rot(int n, int dig) {
		return (int) ((n % 10) * Math.pow(10, dig - 1)) + (int) (n / 10);
	}

	public static void main(String[] args) throws FileNotFoundException {
		String file = "C-large";
		Scanner in = new Scanner(new File(file + ".in"));
		PrintWriter out = new PrintWriter(new File(file + ".out"));

		int T = in.nextInt();
		for (int t = 1; t <= T; t++) {
			int A = in.nextInt();
			int B = in.nextInt();

			int c = 0;
			int[] list = new int[ndigits(B)];
			numbers: for (int i = A; i <= B; i++) {
				int digs = ndigits(i);
				int rot = i;
				int pairs = 0;

				Arrays.fill(list, -1);
				list[0] = i;

				digits: for (int j = 1; j <= digs + 1; j++) {

					rot = rot(rot, digs);
					if(rot < i)
						continue;

					if (A <= rot && rot <= B) {
						for (int k = 0; k < j; k++) {
							if (list[k] == rot) {
								continue digits;
							}
						}
						pairs++;
						list[j] = rot;
					}
				}

				//c += pairs * (pairs + 1) / 2;
				c += pairs ;
				// c+=digs;
			}
			out.println("Case #" + t + ": " + c);
		}

		in.close();
		out.close();
	}
}

import java.io.PrintWriter;
import java.util.Scanner;

public class ProblemC {

	public static void main(String[] args) {
		final Scanner in = new Scanner(System.in);
		final PrintWriter out = new PrintWriter(System.out);
		
		final int t = in.nextInt();
		
		for (int tt = 0; tt < t; tt++) {
			final int a = in.nextInt();
			final int b = in.nextInt();
			
			int count = 0;
			for (int n = a; n < b; n++) {
				count += recycledNumbersCount(n, b);
			}
			
			out.println("Case #" + (tt + 1) + ": " + count); 
		}

		out.flush();
	}
	
	private static int recycledNumbersCount(int n, int b) {
		int count = 0;
		final String s = "" + n;
		String ss = s.charAt(s.length() - 1) + s.substring(0, s.length() - 1);
		while (!s.equals(ss)) {
			if (ss.charAt(0) != '0') {
				final int m = Integer.parseInt(ss);
				if (m > n && m <= b) {
					count++;
				}
			}
			ss = ss.charAt(ss.length() - 1) + ss.substring(0, ss.length() - 1);
		}
		return count;
	}

}
