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.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.io.Reader;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;


public class Main 
{
	
	public static HashMap<Character,Character> mapp = new HashMap<Character,Character>();
	
	public static void main(String[] args) throws Exception
	{
		PrintWriter writer = new PrintWriter(new FileWriter("output.txt"));
		BufferedReader input = new BufferedReader(new FileReader("C-small-attempt0.in"));
		int size=Integer.parseInt(input.readLine());
		for(int i=0; i<size; i++)
		{
			Set<String> mySet = new HashSet<String>();
			String tokens[] = input.readLine().split(" ");
			int lowLimit = Integer.parseInt(tokens[0]);
			int highLimit = Integer.parseInt(tokens[1]);
			int count=0;
			for(int j=lowLimit; j<highLimit; j++)
			{
				for(int k=j+1; k<=highLimit; k++)
				{
					Integer num1 = j;
					Integer num2 = k;
					String str1 = num1.toString();
					String str2 = num2.toString();
					if(str1.length()!=str2.length())
					{
						continue;
					}
					else
					{
						for(int x=0; x<str1.length(); x++)
						{
							String temp = (String)str1.subSequence(str1.length()-1-x, str1.length()) + (String)str1.subSequence(0, (str1.length()-1-x));
							
							//System.out.println("temp="+temp+"	Str2="+str2);
							if(Integer.parseInt(temp)==Integer.parseInt(str2))
							{
								mySet.add(str1+str2);
							}
						}
					}
				}
			}
			writer.println("Case #"+(i+1)+": "+mySet.size());
		}
		writer.close();
		input.close();
	}

}
