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.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashMap;


public class recycle {

    
    public static void rec() throws NumberFormatException, IOException {
        BufferedReader in = new BufferedReader(new FileReader("src/test1")); 

        String line;
        StringBuilder bubs = new StringBuilder();


        int T = Integer.parseInt(""+in.readLine().charAt(0));

        int i=0;
        while ((line=in.readLine())!=null) {
            i++;
            String[] splitline = line.split("\\s+");
            
            int A = Integer.parseInt(splitline[0]);
            int B = Integer.parseInt(splitline[1]);
            int d = splitline[0].length();

            StringBuilder subs = new StringBuilder();
            subs.append("Case #" + i + ": ");
            int count = 0;

            for (int n=A;n<B;n++) {
                String sn = ""+n;
                HashMap<Integer, Integer> hm = new HashMap();

                for (int b=0;b<d-1;b++) {
                    String r = sn.substring(d-1-b);
                    String l = sn.substring(0, d-1-b);
                    String btry = (r+l);
                    if (!hm.containsKey(Integer.parseInt(btry)) && btry.charAt(0)!='0' && Integer.parseInt(btry) > n && Integer.parseInt(btry) <=B) {
                        hm.put(Integer.parseInt(btry), 1);
                        count++;
            
                    }
                    
                }

            }
            subs.append(count);
            bubs.append(subs.toString());
            System.out.println(subs.toString());
        }
        

    }
    
}
