import java.io.*;
import java.util.*;

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

import java.util.*;
import static java.lang.Math.*;

public class C {
	public static void main(String[] args)
	{
		Scanner in = new Scanner(System.in);
		int T = in.nextInt();
		for(int cases = 1; cases <= T;cases++){
			int A = in.nextInt();
			int B = in.nextInt();
			int ans = 0;
			
			
			for(int i = A ; i < B+1; ++i)
			{
				String stringValue = Integer.toString(i);
				HashSet set = new HashSet();
				for(int j = 1; j <stringValue.length(); ++j)
				{
					stringValue = stringValue.substring(1) + stringValue.charAt(0);
					int BB = Integer.parseInt(stringValue);
					if( stringValue.charAt(0) != '0' && i < BB && A <=BB && BB <= B
					    && !set.contains(BB)
 					)
					{
						set.add(BB);
						ans = ans+1;
					}
				}
			
			}
			
			System.out.format("Case #%d: %d\n", cases, ans);
			
			
						
			
			
		}
	}
}
