
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.util.HashSet;
import java.util.Scanner;


public class Main {
	public static void main(String[] args) {
		Scanner r = new Scanner(System.in);
		
		int T = r.nextInt();
		int caseNumber = 1;
		while(T-- > 0){
			int A = r.nextInt();
			int B = r.nextInt();
			
			int ret = 0;
			for(int x = A; x <= B; x++){
				HashSet<Integer> S = new HashSet<Integer>();
				
				int curr = x;
				int L = (curr + "").length();
				int L10 = 1;
				for(int i = 0; i < L - 1; i++)
					L10 *= 10;
				
				for(int itr = 0; itr < L; itr++){
					if((curr + "").length() == L && !S.contains(curr) && curr <= B && curr >= A && curr < x){
						ret++;
					}
					
					S.add(curr);
					curr = R(curr, L10);
				}
			}
			
			System.out.printf("Case #%d: %d\n", caseNumber++, ret);
		}
	}
	static int R(int x, int L){
		int m = x % 10; 
		return (x / 10) + (L * m);
	}
}
