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.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.HashSet;
import java.util.TreeMap;


public class Recycler {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String input;
		BufferedReader br;
		HashSet<String> set;
		try{
			br=new BufferedReader(new InputStreamReader(System.in));
			int T=Integer.parseInt(br.readLine());
			int A,B;
			String []inputs;
			for (int i=0;i<T;i++)
			{
				input=br.readLine();
				inputs=input.split(" ");
				A=Integer.parseInt(inputs[0]);
				B=Integer.parseInt(inputs[1]);
				set=new HashSet<String>();
				
				int s=0;
				int m;
				for (int n=A;n<=B;n++)
				{
					int multiple=10;
					while (1.0*n/multiple > 0)
					{
						m=Integer.parseInt(n%multiple + "" + n/multiple);
						if (m<=B && n<m)
						{
							s++;
							set.add(n+""+m);
						}
						multiple*=10;
					}
					
				}
				System.out.println("Case #"+ (i+1) + ": " +set.size());
			}
		}catch(Exception e)
		{
			
		}
	}

}
