import java.util.HashMap;
import java.util.HashSet;
import java.util.Scanner;

public class Recycle {

	private static HashMap<Integer, HashSet<Integer>> map = new HashMap<Integer, HashSet<Integer>>();
	private static HashSet<Integer> toSkip = new HashSet<Integer>();
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner reader = new Scanner(System.in);
		int T = reader.nextInt();
		for (int tc = 1; tc <= T; tc++) {
			int a = reader.nextInt();
			int b = reader.nextInt();
			long before = System.currentTimeMillis();
			int res = doit(a, b);
			System.out.printf("Case #%d: %d\n", tc, res);
			long after = System.currentTimeMillis();
//			System.out.println("time taken: " + (after - before));
		}
	}

	private static int doit(int a, int b) {
		int count = 0;
		HashSet<Integer> skip = new HashSet<Integer>(toSkip);
		for (int i = a; i <= b; i++) {
			if (skip.contains(i))
				continue;
			HashSet<Integer> arr = generate(i);
//			if(arr.size() > 1) {
//				map.put(i, arr);
//			}
			// System.out.println(i + " --> " +
			// Arrays.deepToString(arr.toArray()));
			int temp = 0;
			if (arr.size() > 1) {
				for (int x : arr) {
					if (x >= a && x <= b) {
						temp++;
						skip.add(x);
					}
				}
				count += temp * (temp - 1) / 2;
			}
//			System.out.println("not skipping " + i + " gen: " + arr.size()+ " " + (temp * (temp - 1) / 2));
		}
		return count;
	}

	private static HashSet<Integer> generate(int num) {
		if(map.containsKey(num)) {
			HashSet<Integer> list = map.get(num);
			return list;
		}
		HashSet<Integer> list = new HashSet<Integer>();
		String s = "" + num;
		list.add(num);
		int len = s.length();
		for (int i = 1; i < len; i++) {
			String temp = s.substring(i) + s.substring(0, i);
			// System.out.println("temp: " + temp);
			if (temp.charAt(0) == '0')
				continue;
			int x = Integer.parseInt(temp);
			if( x <= 2000000) {
				list.add(x);
			}
		}
		if(list.size() > 1) {
			map.put(num, list);
		} else {
			toSkip.add(num);
		}
		return list;
	}

}

import java.util.LinkedList;
import java.util.HashMap;
import java.util.Scanner;

public class Recycled
{
	public static void main(String[] args) throws Exception
	{
        HashMap<Integer,LinkedList<String>> lol = new HashMap<Integer,LinkedList<String>>(); 
        
        for( int i = 1 ; i <= 2500; i++ )
        {
            LinkedList<String> ll = new LinkedList<String>();
            String _i = i + "";
            for( int k = 0 ; k < _i.length();k++)
            {
                String t = _i.substring( k , _i.length() ) + _i.substring( 0 , k );
                for( int j = 4 - t.length(); j >= 0; j-- )
                {
                    ll.add( t );
                    t = t + "0";
                }
            }
            
            lol.put( i , ll );
                
        }
    
		Scanner in = new Scanner( System.in );
		
		int size = in.nextInt();
        
		for( int pos = 1 ; pos <= size ;pos++ )
		{
			int A = in.nextInt();
			int B = in.nextInt();
			
			String _A = A + "";
			String _B = B + "";
			
            int count = 0;
            
			for( int i = A ; i < B ; i++ )
			{
				String a = i + "";
				if( a.length() != _A.length() ) continue;
				for( int j = i + 1; j <= B; j++ )
				{
					String b = j + "";
					if( b.length() != _B.length() ) continue;
                    
                    LinkedList<String> ll = lol.get( i );
                    if( ll.contains( b ) )
                    {
                        count++;
                    }	
				}
			}
			
			
			System.out.println("Case #" + pos + ": " + count);
		}
	}
}