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.*;

public class template {
	public static void main(String[] args) throws IOException {		
		StreamTokenizer in = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
		PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
		//PrintWriter out = new PrintWriter("output.txt");
		
	
		
		in.nextToken(); int count = (int)in.nval;
		
		for(int c = 1 ; c <= count ; c++) {
			int rotations = 0;
			
			in.nextToken(); int a = (int)in.nval;
			in.nextToken(); int b = (int)in.nval;
			
			/*
			ignore 0
			1 = 0 to 9 
			2 = 10 to 99
			...
			7 = 1 000 000 to 9 999 999
			 */
			int[] min = {0, 0, 10, 100, 1000, 10000, 100000, 1000000};
			int[] max = {0, 9, 99, 999, 9999, 99999, 999999, 9999999};
			// set limits
			for(int i = 1 ; i <= 7 ; i++) {
				min[i] = Math.max(min[i], a);
				max[i] = Math.min(max[i], b);
			}
			
			for(int len = 2 ; len <= 7 ; len++) {
				int exp = (int) Math.pow(10, len-1);
				for(int i = min[len] ; i <= max[len] ; i++) {
					int r = i;
					for(int j = 0 ; j < len-1 ; j++) {
						r = r % exp * 10 + (r/exp);
						if (r == i) break;
						if (r > i && r <= max[len] && i != r) rotations++;
					}
				}
			}
			out.println("Case #" + c + ": " + rotations);
		}
		
		
		out.flush();
		out.close();
	}
}
