/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package recyclednumbers;

import java.util.HashSet;

/**
 *
 * @author vandit
 */
public class RecycleNumbers {

    private HashSet<String> numbers = new HashSet<String>();
    private HashSet<String> initialTempNumbers = new HashSet<String>();
    private HashSet<String> finalTempNumbers = new HashSet<String>();

    HashSet<Pair> numberPairs = new HashSet<Pair>();


    private void findRecycledNumbers(int start, int end, int places) {


        for (int i = start; i <= end; i++) {
            String initialNumber = Integer.toString(i);
            //if (!(numbers.contains(initialNumber) || finalTempNumbers.contains(initialNumber))) {

                StringBuffer tempNumber = new StringBuffer(initialNumber);
                int len = tempNumber.length();
                int startIndexToMove = len - places;
                String tempString = tempNumber.substring(startIndexToMove);
                if ((places == 1 && tempString.equals("0")) || tempString.charAt(0) == '0') {
                    continue;
                }
                tempNumber.delete(startIndexToMove, len);
                String finalTempNumber = tempString + tempNumber.toString();

                if (! (finalTempNumber.equals(initialNumber) || Integer.parseInt(finalTempNumber) > end || Integer.parseInt(finalTempNumber) < Integer.parseInt(initialNumber))) {
                    numbers.add(initialNumber);
                    finalTempNumbers.add(finalTempNumber);
                    Pair pair = new Pair(finalTempNumber,initialNumber);
                    numberPairs.add(pair);
                }
            }

        

    }

    public HashSet<Pair> findAllRecycledNumbers(int start, int end) {
        int length = Integer.toString(start).length();
        for (int i = 1; i < length; i++) {
            findRecycledNumbers(start, end, i);
        }
        return numberPairs;
    }
}

import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;


public class RecycledNumbers {

	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		
		Scanner in;
		in = new Scanner(new FileReader("C-small.in"));
		FileWriter output = new FileWriter("C-small.out");
		/*in = new Scanner(new FileReader("C-large.in"));
		FileWriter output = new FileWriter("C-large.out");*/
		
		int T = in.nextInt();

		for(int i = 1; i <= T; i++) {
			int a = in.nextInt();
			int b = in.nextInt();

			int recycle = 0;
			for(int n = a; n < b; n++) {
				StringBuffer sb = new StringBuffer(Integer.toString(n));
				sb.trimToSize();
				int m = -1;
				
				for(int j = 1; j < sb.length(); j++) {
					sb.append(sb.charAt(0));
					sb.deleteCharAt(0);
					sb.trimToSize();

					if ( m != Integer.parseInt(sb.toString()) ) {
						int check = m;
						m = Integer.parseInt(sb.toString());

						if(m <= b && m>n) {
							//System.out.println(a + " " + n + " " + m + " " + b);
							recycle++;
						} else m = check;
					}
					
				}
			}
			
			output.write("Case #" + i + ": " + recycle + "\n");
			
		}
		
		in.close();
		output.flush();
		output.close();

	}

}
