import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Q3M {
	public static void main(String[] args) throws Exception {
		compute();
	}

	private static void compute() throws Exception {
		BufferedReader br = new BufferedReader(new FileReader(new File(
				"C:\\work\\Q3\\C-small-attempt0.in")));
		String line = null;
		int i = Integer.parseInt(br.readLine());
		List l = new ArrayList();
		for (int j = 0; j < i; j++) {
			line = br.readLine();
			String[] nums = line.split(" ");
			l.add(calculate(nums));
		}
		writeOutput(l);
	}

	private static int calculate(String[] nums) {
		int min = Integer.parseInt(nums[0]);
		int max = Integer.parseInt(nums[1]);
		int count = 0;
		List l = new ArrayList();
		for (int i = min; i <= max; i++) {
			for (int times = 1; times < countDigits(i); times++) {
				int res = shiftNum(i, times);
				if (res <= max && i < res) {
					if ((!l.contains((i + ":" + res)))) {
						l.add(i + ":" + res);
						l.add(res + ":" + i);
						count++;
					}
				}
			}
		}
		return count;
	}

	private static boolean checkZeros(int temp, int res) {
		if (temp % 10 == 0 || res % 10 == 0)
			return false;
		return true;
	}

	private static int shiftNum(int n, int times) {
		int base = (int) Math.pow(10, times);
		int temp2 = n / base;
		int placeHolder = (int) Math.pow((double) 10,
				(double) countDigits(temp2));
		int res = placeHolder * (n % base) + temp2;
		if (countDigits(res) == countDigits(n)) {
			return res;
		} else {
			return 2000001;
		}
	}

	public static int countDigits(int x) {
		if (x < 10)
			return 1;
		else {
			return 1 + countDigits(x / 10);
		}
	}

	private static void writeOutput(List l) throws Exception {
		StringBuffer b = new StringBuffer();
		int i = 1;
		BufferedWriter br = new BufferedWriter(new FileWriter(new File(
				"C:\\work\\Q3\\ans.txt")));
		for (Iterator iterator = l.iterator(); iterator.hasNext();) {
			br.write("Case #" + i++ + ": " + iterator.next());
			br.newLine();
		}
		br.close();
	}

}
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class RN {

	static ArrayList<Character> str2list(String s) {
		ArrayList<Character> r = new ArrayList<Character>();
		for (char c : s.toCharArray()) {
			r.add(c);
		}
		return r;
	}

	static String list2str(ArrayList<Character> cs) {
		StringBuilder builder = new StringBuilder(cs.size());
		for (Character c : cs)
			builder.append(c);
		return builder.toString();
	}

	static ArrayList<String> cycles(String s) {
		ArrayList<Character> cs = str2list(s);

		ArrayList<String> res = new ArrayList<String>();

		for (int i = 0; i < cs.size(); i++) {
			Collections.rotate(cs, 1);
			res.add(list2str(cs));
		}
		
		HashSet<String> hs = new HashSet<String>(res);
		return new ArrayList<String>(hs);
	}

	static void log(String fs, Object... args) {
		System.err.println(String.format(fs, args));
	}

	public static void main(String[] args) throws FileNotFoundException {
		String filename = "src/C-small-attempt0.in";
		Scanner sc = 
				new Scanner(
						new FileInputStream(
								new File(filename)));
		PrintWriter pw = 
				new PrintWriter(
						new FileOutputStream(
								new File(filename + ".result")));

		int N = sc.nextInt();
		for (int task = 1; task <= N; task++) {
			int A = sc.nextInt();
			int B = sc.nextInt();

			int cnt = 0;
			for (int i = A; i <= B; i++) {
				String s = Integer.toString(i);
				for (String r : cycles(s)) {
					int n = Integer.parseInt(r);
					if (n >= A && n <= B && r.charAt(0) != '0' && !r.equals(s)) {
						cnt++;
					}
				}
			}
			pw.println(String.format("Case #%d: %d", task, cnt / 2));
		}
		pw.close();
	}

}
