
import java.util.Scanner;
import java.util.Set;
import java.util.TreeSet;
import java.io.File;
import java.io.IOException;
import java.io.FileWriter;
import java.io.BufferedWriter;

public class Recycle
{
	public static void main(String[] args)
	{
/*		Set<Integer> perms = getPermutations(123456);
		
		for(Integer i: perms)
			System.out.println(i);*/
	
		try
		{
			Scanner s = new Scanner(new File("recycle.in"));
			BufferedWriter w = new BufferedWriter(new FileWriter(new File("recycle.out")));
			int numCases = s.nextInt();
			s.nextLine();
			
			for(int n = 1;n <= numCases; n++)
			{
				int A = s.nextInt();
				int B = s.nextInt();
				int count = 0;
				for(int k = A; k <= B; k++)
				{
					count += getNumPairs(k, B);
				}
				
				w.write("Case #" + n + ": " + count + "\n");
			}
			
			w.flush();
			w.close();
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
	}
	
	public static int getNumPairs(int n, int B)
	{
		Set<Integer> possibles = getPermutations(n);
		int count = 0;
		for(Integer i : possibles)
			if(i > n && i <= B)
				count++;
		return count;
	}
	
	public static Set<Integer> getPermutations(int n)
	{
		Set<Integer> perms = new TreeSet<Integer>();
		char[] digits = String.valueOf(n).toCharArray();
		
		for(int firstPos = 1; firstPos < digits.length; firstPos++)
		{
			String toBuild = "";
			for(int k = 0; k < digits.length; k++)
				toBuild += digits[(firstPos + k) % digits.length];
			perms.add(Integer.parseInt(toBuild));
		}
		return perms;
	}
	

}
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;


public class RecycledNumbers {
	public static void main(String args[]) throws IOException{
		String inputFile = args[0];
		String outputFile = args[1];
		BufferedReader input = new BufferedReader(new FileReader(inputFile));
		PrintWriter   output = new PrintWriter(outputFile);
		
		int testcases = Integer.valueOf(input.readLine());
		int testcase  = 0;
		while (testcase++ < testcases) {
			int result = 0;
			String newline = input.readLine();
			String tokens[] = newline.split(" ");
			long A = Long.valueOf(tokens[0]);
			long B = Long.valueOf(tokens[1]);
			
			int digit = 1;
			long baseAndMask = 10;
			long dummyA = A;
			while ((dummyA = dummyA / 10) > 0) {
				digit++;
				baseAndMask *= 10;
			}
			
			long i;
			for (i = A; i < B; i++) {
				int k = digit;
				long recycled = i * baseAndMask + i;
				while (k-- > 0) {
					long j = recycled % baseAndMask;
					if (j <= B && j > i) {
						result++;
					}
					recycled = recycled / 10;
				}
			}
			
			output.printf("Case #%d: %d\n", testcase, result);
		}
		
		output.close();
	}
}
