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();
	}

}
/*************************************************************************
 *  Compilation:  javac StdOut.java
 *  Execution:    java StdOut
 *
 *  Writes data of various types to standard output.
 *
 *************************************************************************/

import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.util.Locale;

/**
 *  <i>Standard output</i>. This class provides methods for writing strings
 *  and numbers to standard output.
 *  <p>
 *  For additional documentation, see <a href="http://introcs.cs.princeton.edu/15inout">Section 1.5</a> of
 *  <i>Introduction to Programming in Java: An Interdisciplinary Approach</i> by Robert Sedgewick and Kevin Wayne.
 */
public final class StdOut {

    // force Unicode UTF-8 encoding; otherwise it's system dependent
    private static final String UTF8 = "UTF-8";

    // assume language = English, country = US for consistency with StdIn
    private static final Locale US_LOCALE = new Locale("en", "US");

    // send output here
    private static PrintWriter out;

    // this is called before invoking any methods
    static {
        try {
            out = new PrintWriter(new OutputStreamWriter(System.out, UTF8), true);
        }
        catch (UnsupportedEncodingException e) { System.out.println(e); }
    }

    // singleton pattern - can't instantiate
    private StdOut() { }

    // close the output stream (not required)
   /**
     * Close standard output.
     */
    public static void close() {
        out.close();
    }

   /**
     * Terminate the current line by printing the line separator string.
     */
    public static void println() {
        out.println();
    }

   /**
     * Print an object to standard output and then terminate the line.
     */
    public static void println(Object x) {
        out.println(x);
    }

   /**
     * Print a boolean to standard output and then terminate the line.
     */
    public static void println(boolean x) {
        out.println(x);
    }

   /**
     * Print a char to standard output and then terminate the line.
     */
    public static void println(char x) {
        out.println(x);
    }

   /**
     * Print a double to standard output and then terminate the line.
     */
    public static void println(double x) {
        out.println(x);
    }

   /**
     * Print a float to standard output and then terminate the line.
     */
    public static void println(float x) {
        out.println(x);
    }

   /**
     * Print an int to standard output and then terminate the line.
     */
    public static void println(int x) {
        out.println(x);
    }

   /**
     * Print a long to standard output and then terminate the line.
     */
    public static void println(long x) {
        out.println(x);
    }

   /**
     * Print a short to standard output and then terminate the line.
     */
    public static void println(short x) {
        out.println(x);
    }

   /**
     * Print a byte to standard output and then terminate the line.
     */
    public static void println(byte x) {
        out.println(x);
    }

   /**
     * Flush standard output.
     */
    public static void print() {
        out.flush();
    }

   /**
     * Print an Object to standard output and flush standard output.
     */
    public static void print(Object x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a boolean to standard output and flush standard output.
     */
    public static void print(boolean x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a char to standard output and flush standard output.
     */
    public static void print(char x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a double to standard output and flush standard output.
     */
    public static void print(double x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a float to standard output and flush standard output.
     */
    public static void print(float x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print an int to standard output and flush standard output.
     */
    public static void print(int x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a long to standard output and flush standard output.
     */
    public static void print(long x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a short to standard output and flush standard output.
     */
    public static void print(short x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a byte to standard output and flush standard output.
     */
    public static void print(byte x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a formatted string to standard output using the specified
     * format string and arguments, and flush standard output.
     */
    public static void printf(String format, Object... args) {
        out.printf(US_LOCALE, format, args);
        out.flush();
    }

   /**
     * Print a formatted string to standard output using the specified
     * locale, format string, and arguments, and flush standard output.
     */
    public static void printf(Locale locale, String format, Object... args) {
        out.printf(locale, format, args);
        out.flush();
    }

    // This method is just here to test the class
    public static void main(String[] args) {

        // write to stdout
        StdOut.println("Test");
        StdOut.println(17);
        StdOut.println(true);
        StdOut.printf("%.6f\n", 1.0/7.0);
    }

}
