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();
		}
	}
}

package googleCodeJam;

import static java.lang.System.out;

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.Set;
import java.util.TreeSet;

public class RecycledNumbers {
  public static void main(String[] args) throws Exception {
    if (args.length == 1) {
      // opening the input
      BufferedReader in = new BufferedReader(new FileReader(args[0]));
      
      // reading the number of test cases
      String line = null;
      int numberOfTestCases = ((line = in.readLine()) != null) ? Integer.parseInt(line) : 0;
      for (int t = 0; t < numberOfTestCases; t ++) {
        line = in.readLine();
        out.print("Case #" + (t+1) + ": ");
        
        // parse input
        String[] numbers = line.split(" ");
        int n = Integer.parseInt(numbers[0]);
        int m = Integer.parseInt(numbers[1]);
        
        int counter = 0;
        StringBuffer is = new StringBuffer(128);
        String isCurrent = null;
        for (int i = n; i <= m; i ++) {
          is.append(i);
          int size = is.length();
          is.append(i);
          //
          Set<Integer> qs = new TreeSet<Integer>();
          for (int j = 0; j < size; j ++) {
            isCurrent = is.substring(j, j+size);
            int q = Integer.parseInt(isCurrent);
            if (i < q && q <= m /*&& !isCurrent.startsWith("0")*/) {
              //counter ++;
              //out.println(i + "\t" + q + "\t" + (size - j));
              qs.add(q);
            }
          }
          //
          counter += qs.size();
          is.setLength(0);
        }
        
        out.println(counter);
      }
      
      // closing the input
      in.close();
    } else {
      // show the usage
      System.err.println("Using: java googleCodeJam.RecycledNumbers input");
    }
  }

}
