import java.io.*;

class code1
{
	public static void main(String args[]) throws Exception 
	{
		File ii = new File ("C-small-attempt1.in");
		FileInputStream fis = new FileInputStream(ii);
		BufferedReader  br = new BufferedReader(new InputStreamReader (fis));
		int cases = Integer.parseInt(br.readLine());
		FileOutputStream fout = new FileOutputStream ("output.txt");
		DataOutputStream dout = new DataOutputStream (fout);
		int total=0;
		for(int i=0;i<cases;i++){
		String temp = br.readLine();
		String parts [] = temp.split(" ");
		int lower = Integer.parseInt(parts[0]);
		int upper = Integer.parseInt(parts[1]);
		System.out.println(lower+" "+upper);
		
		for(int j=lower;j<=upper;j++)
		{
			int abc = j;int length=0;
			if(j<10)continue;
			while (abc!=0){abc/=10;length++;}
			abc=j;
			for(int m=0;m<length-1;m++){
				int shift = abc%10;
				abc=abc/10;
				System.out.println("hi "+j);
				abc=abc+shift*power(10,length-1);
				if(abc<=upper&&shift!=0&&abc>j)total++;
				System.out.println(total);
			}
		}
 		dout.writeBytes("Case #"+(i+1)+ ": "+total+"\n");
 		total=0;
		}//for close
		
	}

	private static int power(int i, int j) {
		int no=1;
		for(int a=0;a<j;a++){no=10*no;}
		return no;
	}
}
import java.io.*;
import java.util.*;
import java.math.*;

public class Main implements Runnable
{
	static Scanner scanner;
	static BufferedReader input;
	static PrintWriter pw;

	public static void main(String[] args) throws Exception
	{
		new Thread(new Main()).start();
	}

	public void run()
	{
		try
		{
			input = new BufferedReader(new FileReader("input.txt"));
			scanner = new Scanner(input);
			pw = new PrintWriter(new File("output.txt"));

			solve();
			pw.close();
		}
		catch(Exception e)
		{
			e.printStackTrace();
			System.exit(1);
		}
	}

	public void solve() throws Exception
	{
		int T = scanner.nextInt();
		for(int t = 0; t < T; t++)
		{

			int A = scanner.nextInt();
			int B = scanner.nextInt();

			String AA = String.valueOf(A);
			String BB = String.valueOf(B);

			int dd = AA.length(); // digit

			int ans = 0 ;
			int n,idx;
			int[] m = new int[dd];
			int[] f = new int[dd];
			for ( n = A ; n < B ; n++ ) {
				for (idx = 1 ; idx < dd ; idx++ ) {
					m[idx] = this.recycle ( n , idx );
					f[idx] = 0 ; 
					if ( String.valueOf(m[idx]).length() == dd ) {
						if ( m[idx] > n && m[idx] <= B ) {
							f[idx]=1;
							ans++;
						}
					}
				}

				for ( int i=0 ; i < dd ; i++ ){
					if ( f[i] == 1 ) {
						for ( int j = i+1 ; j < dd ; j++) {
							if ( m[i] == m[j] ) {
								ans--;
							}
						}
					}
				}
			}

			pw.println("Case #" + (t+1) + ": " + ans);
		}
	}
	public int recycle (int i, int index){
		return Integer.parseInt ( this.recycle ( String.valueOf(i),index ) ) ;
		
	}

	public String recycle (String s, int index){
		return s.substring(index, s.length()) + s.substring( 0, index );
	}
}
