/*
 * 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.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;


public class RecycledNumbers {
	public static void main(String args[]) throws IOException{
		String inputFile = args[0];
		String outputFile = args[1];
		BufferedReader input = new BufferedReader(new FileReader(inputFile));
		PrintWriter   output = new PrintWriter(outputFile);
		
		int testcases = Integer.valueOf(input.readLine());
		int testcase  = 0;
		while (testcase++ < testcases) {
			int result = 0;
			String newline = input.readLine();
			String tokens[] = newline.split(" ");
			long A = Long.valueOf(tokens[0]);
			long B = Long.valueOf(tokens[1]);
			
			int digit = 1;
			long baseAndMask = 10;
			long dummyA = A;
			while ((dummyA = dummyA / 10) > 0) {
				digit++;
				baseAndMask *= 10;
			}
			
			long i;
			for (i = A; i < B; i++) {
				int k = digit;
				long recycled = i * baseAndMask + i;
				while (k-- > 0) {
					long j = recycled % baseAndMask;
					if (j <= B && j > i) {
						result++;
					}
					recycled = recycled / 10;
				}
			}
			
			output.printf("Case #%d: %d\n", testcase, result);
		}
		
		output.close();
	}
}
