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 C 
{
	public static void main(String[] argv) throws IOException
	{		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int num = Integer.parseInt(br.readLine());
		for(int i=0 ; i<num ; i++)
		{
			String str = br.readLine();
			String[] arr = str.split(" ");
			int A = Integer.parseInt(arr[0]);
			int B = Integer.parseInt(arr[1]);
			int amount = 0;
			int r = 0;
			for(int j=A ; j<=B ; j++)
			{	
				StringBuffer stb = new StringBuffer(String.valueOf(j));
				
				for(int k=0 ; k<stb.length() ; k++)//total assume
				{	
					stb.append(stb.substring(0,1));
					stb.delete(0,1);
					
					int now = Integer.parseInt(stb.toString());
					if(now<=B && now>=j+1 && (j+1<=B))
					{
						amount++;						
					}					
				}
			}			
			
			System.out.println("Case #" + (i+1) + ": " + amount);			
		}
	}
	
}
