/*
 * 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.*;

public class Recycle {
	public static void main(String args[]) {
		try {
			InputStreamReader inReader = new InputStreamReader(new FileInputStream("input.txt"));
			BufferedReader br = new BufferedReader(inReader);
			
			File out = new File("output.txt");
			Writer output = new BufferedWriter(new FileWriter(out));
			
			int amount = Integer.parseInt(br.readLine());
			
			for (int i=0; i < amount; i++) {
				output.write("Case #" + (i+1) + ": ");
				String line = br.readLine();
				
				int min = Integer.parseInt(line.split(" ")[0]);
				int max = Integer.parseInt(line.split(" ")[1]);
				
				int result = 0;
				int digits = 1;
				int tmp = max;
				
				while (tmp/10 > 0) {
					tmp /= 10;
					digits++;
				}
				
				int[] assist = new int[digits];
				for (int l=0; l < digits; l++)
					assist[l] = 0;
				
				for (int j=min; j <= max; j++) {
					int number = j;
					int counter = 0;
					for (int k=1; k < digits; k++) {
						int newNumber = (int) ((int) (number%Math.pow(10, k)) * Math.pow(10, digits-k) + (number/Math.pow(10, k)));
						if (newNumber > number && newNumber <= max) {
							for (int l=0; l < counter; l++) {
								if (assist[l] == newNumber)
									result--;
							}
							
							assist[counter++] = newNumber;
							result++;
						}
					}
				}
				
				output.write(result + "\n");
			}
			
			output.close();
		}
		
		catch (Exception e) {
			e.printStackTrace();
		}
	}
}