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.BufferedWriter;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;

public abstract class Solution{
	protected Problem problem;
	private String problemFileName;
    
	abstract public StringBuffer solve();

    public Solution(String problemFileName){
		this.problemFileName = problemFileName;
		problem = new Problem(problemFileName);
	}
	
	public void saveToFile(StringBuffer buffer){
		try {
			File f = new File(problemFileName);
			String fileout = stripExtension(f.getName())+".out";
			BufferedWriter out = new BufferedWriter(new FileWriter(fileout));
			String outText = buffer.toString();
			System.out.println(outText);
			out.write(outText);
			out.close();
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}		
	}	
	
    static String stripExtension (String str) {
        if (str == null) return null;
        int pos = str.lastIndexOf(".");
        if (pos == -1) return str;
        return str.substring(0, pos);
    }	
        
}

class Problem{
	private String[] cases; 

	public Problem(String filename){
		// TODO Auto-generated method stub
		try{
			// Open the file that is the first 
			// command line parameter
			FileInputStream fstream = new FileInputStream(filename);
			// Get the object of DataInputStream
			DataInputStream in = new DataInputStream(fstream);
			BufferedReader br = new BufferedReader(new InputStreamReader(in));
			String strLine;
			int totalCase = Integer.parseInt(br.readLine());
			int i = 0;
			cases = new String[totalCase];
			//Read File Line By Line
			while ( (i<totalCase) && (strLine = br.readLine()) != null)   {
				// Print the content on the console
				if(strLine.length()>0){
					cases[i] = strLine;
					i++;
				}
			}
			//Close the input stream
			in.close();
		}catch (Exception e){//Catch exception if any
			System.err.println("Error: " + e.getMessage());
		}
	}

	public int count(){
		return cases.length;
	}
	
	public String getCase(int index){
		return cases[index];
	}
}