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();
		}
	}
}

/*
 * Yasser Rabi
 */
package c;
import java.io.*;
import java.util.*;

public class main {

public static int recycled (int A, int B){
                int m = 0, c=0;
                String tmp = "", subB = "", subE = "", recycled = "";
                for (int n = A; n<B;n++)
                {
                        tmp = String.valueOf(n);
                        for (int j=0;j<tmp.length();j++)
                        {
                            subB = tmp.substring(0,j);
                            subE = tmp.substring(j);
                            recycled = subE+subB;
                            m = Integer.parseInt(recycled);
                            if ((m>n) && (m<=B)) 
                             {c++;}
                        }
                }
                return c;
        }
    public static void main(String[] args) throws FileNotFoundException, IOException {
        String ligne = "";
        int nbrLigne = 0,res,a,b;
        StringTokenizer st1;
        FileInputStream fStream = new FileInputStream("C:\\C-large.in");
		BufferedReader in = new BufferedReader(new InputStreamReader(fStream));
                if (in.ready()) {
			ligne = in.readLine();
			nbrLigne = Integer.parseInt(ligne);
      			for (int j = 0; j < nbrLigne; j++) {
				ligne = in.readLine();
                                st1=new StringTokenizer(ligne," ");
                                 a=Integer.parseInt(st1.nextToken());
                                  b=Integer.parseInt(st1.nextToken());
				System.out.print("Case #"+(j+1)+": ");
                                res=recycled(a,b);
                                System.out.print(res);
                          System.out.println("");
			}
		}
    }
}
