/*
 * 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.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;

public class C {
	public static void main(String[] args) throws IOException {
		String filename = "C-small-attempt0";
		String inname = filename + ".in";
		String outname = filename + ".out";
		Scanner sc = new Scanner(new File(inname));
		//Scanner sc = new Scanner(System.in);
		PrintWriter out = new PrintWriter(new FileWriter(outname));

		int N = sc.nextInt();
		for (int t = 1; t <= N; t++) {
			int a = sc.nextInt();
			int b = sc.nextInt();
			int l = Integer.toString(a).length();
			int ans = 0;
			for(int n = a; n <= b; n++) {
				for(int i = 1; i < l; i++) {
					int front = n/((int)Math.pow(10, i));
					int back = n%((int)Math.pow(10, i));
					int m = back * (int) Math.pow(10,l-i) + front;
					//System.out.println(m + " " + n);
					if(m != n && m/(int)Math.pow(10,l-1) != 0 && n < m && m <= b) ans++;
				}
				
			}
			out.println("Case #" + t + ": " + ans);
			System.out.println("Case #" + t + ": " + ans);
		}
		out.close();
	}
}
