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.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeMap;


public class Recycled {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		BufferedReader bufferRead = new BufferedReader(new InputStreamReader(System.in));
		String line;
		Integer i = 1;
		Integer licz = 0;
		boolean first = true; 
		try {
			while ((line = bufferRead.readLine()) != null && line.length()!= 0)
			{
				if (first)
				{
					licz = Integer.parseInt(line);
					first = false;
				}
				else
				{
					System.out.print("Case #" + i +": ");
					// tu wlasciwe obliczenie
					String[] split = line.split(" ");
					policzRececled(split[0], split[1]);
					System.out.println();
					i++;
					licz--;
				}
				if (licz < 0)
					break;
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

	private static int policzRececled(String A, String B) {
		if (A.length() == 1)
		{
			System.out.print("0");
			return 0;
		}
		Map<String,Integer> map = new HashMap<String, Integer>();
		Integer licznikPar = 0;
		Integer min = Integer.parseInt(A);
		Integer max = Integer.parseInt(B);
		for (Integer X = min; X <= max; ++X)
		{
			String S = X.toString();
			for (int i = 1; i < A.length(); ++i)
			{
				String subS = S.substring(0, i);
				String subE = S.substring(i);
				String sNew = subE + subS;
				Integer iNew = Integer.parseInt(sNew);
				if (X < iNew && iNew >= min && iNew <= max)
				{
					String ss = "" + X + iNew;
					if (map.containsKey(ss))
					{
						Integer j = map.get(ss);
						j++;
						map.put(ss, j);
					}
					else
					{
						map.put(ss, 1);
					}
					//System.out.println(licznikPar + ": " + X + " -> " + iNew);
					//licznikPar++;
				}
			}
		}
		System.out.print(map.size());
		/*
		System.out.println();
		Set<Entry<String, Integer>> entrySet = map.entrySet();
		int ii = 1;
		for (Entry<String, Integer> entry : entrySet) {
			System.out.println(ii + ": " + entry.getKey() + " -> " + entry.getValue());
			ii++;
		}
		*/
		return 0;
	}

}
