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.util.ArrayList;
import java.util.HashMap;

public class ProblemC {
	
	static ArrayList<Integer> allTheNumbers = new ArrayList<Integer>();
	static HashMap<Long, Long> binomCoeff = new HashMap<Long, Long>();
	
	public static int solveC(int A, int B)
	{
		allTheNumbers = new ArrayList<Integer>();
		int count = 0;
		String seeds[] = new String[B-A+1];
	//	System.out.println("SIZE OF ARRAY:" + seeds.length);
		for(int i = A, n = 0; n < seeds.length; i++, n++)
		{
			seeds[n] = Integer.toString(i);
			//System.out.println(seeds[n]);
		}
		
		
		for(int i = 0; i < seeds.length; i++)
		{
			count += binom(CircularStringShift(seeds[i], A, B),2);
		}
		
		return count;
	}
	public static int CircularStringShift(String s, int lowerLimit, int upperLimit)
	{
		String tmp = s;
		char placeHolder = ' ';
		int count = 0;
		int tmp2;
		
		for(int i = 0; i < s.length(); i++)
		{
			placeHolder = tmp.charAt(0);
			tmp = tmp.substring(1, tmp.length()) + placeHolder ;
			tmp2 = Integer.parseInt(tmp);
			if(!allTheNumbers.contains(tmp2) && tmp2 >= lowerLimit && tmp2 <= upperLimit && tmp != s)
			{
				count++;
				allTheNumbers.add(tmp2);
			}
					
		}
	
		
		
		return count;
	}
	
	static long binom(int n, int k) {
		
		if(binomCoeff.containsKey(n))
		{
			return binomCoeff.get(n);
		}
		
		long coeff = 1;
		for (int i = n - k + 1; i <= n; i++) {
			coeff *= i;
		}
		for (int i = 1; i <= k; i++) {
			coeff /= i;
		}
		binomCoeff.put((long)n, coeff);
		return coeff;
	}
 

}

