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.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class FileUtil {

	private static final String RESULT_PATH = "/home/ypxu/src/codejam/2012";

	
	public static String[] readFile(String filePath) {
		List<String> content = new ArrayList<String>();
		try {
			BufferedReader bis = new BufferedReader(new FileReader(filePath));
			String current = null;
			while ((current = bis.readLine()) != null && current.length() > 0) {
				content.add(current);
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return content.toArray(new String[content.size()]);
	}

	public static int getNumOfTestCases(String[] content) {
		// for code jam, it's in first line
		assert content != null;
		String numStr = content[0];
		return Integer.parseInt(numStr);
	}

	public static String[] getAllTestCases(String[] content) {
		assert content != null;
		int len = content.length;
		String[] testCases = new String[len - 1];
		for (int i = 0; i < len - 1; i++) {
			testCases[i] = content[i + 1];
		}
		return testCases;
	}

	public static String formatTestResult(int index, String result) {
		assert result != null;
		return String.format("Case #%1$d: %2$s", index + 1, result);
	}

	public static void writeTestResult(String fileName, String[] results) {
		try {
			FileWriter fstream = new FileWriter(fileName);
			BufferedWriter out = new BufferedWriter(fstream);
			for (String result : results) {
				out.write(result + "\n");
			}
			out.close();
		} catch (Exception e) {
			System.err.println("Error: " + e.getMessage());
		}
	}

	public static long toNumber(String in) {
		return Long.valueOf(in);
	}

	public static long toNumber(char ch) {
		return toNumber(Character.toString(ch));
	}

	public static char toChar(String in) {
		char[] chars = in.toCharArray();
		if (chars.length <= 0) {
			return 0;
		}
		return chars[0];
	}

	public static boolean isNumber(String in) {
		try {
			Integer.parseInt(in);
			return true;
		} catch (Exception e) {
			return false;
		}
	}

	public static String join(char[] chars, String delimiter) {
		int len = chars.length;
		String[] strArr = new String[len];

		for (int i = 0; i < len; i++) {
			strArr[i] = Character.toString(chars[i]);
		}
		return join(strArr, delimiter);
	}

	public static String join(String[] strs, String delimiter) {
		int len = strs.length;
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < len; i++) {
			if (sb.length() > 0) {
				sb.append(delimiter).append(strs[i]);
			} else {
				sb.append(strs[i]);
			}
		}
		return "[" + sb.toString() + "]";
	}

	public static class Timer {
		private static long timestamp = System.currentTimeMillis();

		public static void start() {
			Timer.timestamp = System.currentTimeMillis();
		}

		public static void stop() {
			long current = System.currentTimeMillis();
			long pass = current - timestamp;
			System.out.println("total: " + pass + " ms");
		}
	}

}
