/*
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 * 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;
import java.util.ArrayList;
import java.util.List;

public class Recycle {

	public static void main(String[] args) throws IOException {
		long t0 = System.currentTimeMillis();
		BufferedReader in = new BufferedReader(new FileReader("in.txt"));
		PrintWriter out = new PrintWriter("out.txt");
		int t = Integer.parseInt(in.readLine());
		for (int i = 1; i <= t; i++) {
			String[] ss = in.readLine().split(" ");
			int from = Integer.parseInt(ss[0]);
			int to = Integer.parseInt(ss[1]);
			out.println("Case #" + i + ": " + compute(from, to));
			System.out.println("Case #" + i + ": " + compute(from, to));
		}
		out.close();
		System.out.println("time: " + (System.currentTimeMillis() - t0));
	}

	private static int[] maxNum = { 0, 9, 99, 999, 9999, 99999, 999999, 2000000 };
	private static int[] precomputed = { 0, 0, 36, 801, 12060, 161982, 2023578, 299997 };

	private static int compute(int from, int to) {
		int dFrom = from <= 9 ? 1 : from <= 99 ? 2 : from <= 999 ? 3 : from <= 9999 ? 4 : from <= 99999 ? 5 : from <= 999999 ? 6 : 7;
		int dTo = to <= 9 ? 1 : to <= 99 ? 2 : to <= 999 ? 3 : to <= 9999 ? 4 : to <= 99999 ? 5 : to <= 999999 ? 6 : 7;
		int count;
		if (dFrom == dTo) {
			count = compute(from, to, dFrom);
		} else {
			count = 0;
			count += compute(from, maxNum[dFrom], dFrom);
			for (int i = dFrom + 1; i < dTo; i++) {
				// count += compute(maxNum[i - 1] + 1, maxNum[i], i);
				count += precomputed[i];
			}
			count += compute(maxNum[dTo - 1] + 1, to, dTo);
		}
		return count;
	}

	private static int compute(int from, int to, int digits) {
		int count = 0;
		int f = 1;
		for (int d = 1; d < digits; d++) {
			f *= 10;
		}
		List<Integer> recycled = new ArrayList<Integer>();
		for (int n = from; n <= to; n++) {
			recycled.clear();
			int m = n;
			for (int d = 1; d < digits; d++) {
				int r = (m % 10);
				m = (r * f) + (m / 10);
				if (r > 0 && m < n && m >= from && m <= to) {
					if (recycled.contains(m)) {
						// System.out.println("(" + m + "," + n + ")");
					} else {
						recycled.add(m);
						count++;
					}
				}
			}
		}
		return count;
	}

}
