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.*;
import java.util.*;
import java.text.*;

public class Main implements Runnable{

	/**
	 * @param args
	 */
	private StringTokenizer stReader;
	private BufferedReader bufReader;
	private PrintWriter out;
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		(new Main()).run();
	}

	@Override
	public void run() {
		// TODO Auto-generated method stub
		bufReader = new BufferedReader(new InputStreamReader(System.in));
		out = new PrintWriter(new OutputStreamWriter(System.out));
		stReader = null;
		Solves();
		out.flush();
	}
	public String ReadLine() {
		String result = null;

		try {
			result = bufReader.readLine();
		} catch (IOException e) {
		}
		return result;
	}
	public String NextString(){
		if (stReader == null || !stReader.hasMoreTokens()){
			stReader = new StringTokenizer(ReadLine(),"\n\r ");
		}
		return stReader.nextToken();
	}
	public int NextInt(){
		return Integer.parseInt(NextString());
	}
	public long NextLong(){
		return Long.parseLong(NextString());
	}
	public double NextDouble(){
		return Double.parseDouble(NextString());
	}
	void Solves(){
		int n = NextInt();
		for(int i =0; i < n; i++){
			out.print("Case #"  +(i + 1) + ": ");
			Solve();
			out.println();
		}
		out.flush();
	}
	void Solve(){
		int A = NextInt();
		int B = NextInt();
		int result = 0;
		TreeSet<Integer> treeSet = new TreeSet<Integer>();
		for(int i = A; i <=B; i++){
			if (i <= 10) continue;
			StringBuilder parse = new StringBuilder(String.valueOf(i));
			treeSet.clear();
			for(int j =0;j < parse.length(); j++){
				int val = Shift(parse);
				if (val > i && val <= B && !treeSet.contains(val)) { 
					result++;
					treeSet.add(val);
				}
			}
			treeSet.clear();
		}
		out.print(result);
	}
	int Shift(StringBuilder parse){
		char last = parse.charAt(parse.length()-1);
		parse = parse.deleteCharAt(parse.length()-1);
		parse = parse.insert(0, last);
		return Integer.valueOf(parse.toString());
	}
}
