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();
	}

}
/*
ID: yourID
LANG: JAVA
TASK: Recycled_Numbers
*/
import java.io.*;
import java.math.*;
import java.util.*;
/*public class Recycled_Numbers {

}
 */
public class Recycled_Numbers implements Runnable {
	// based on Petr's template
	boolean localDebug = false;

	private void solve() throws IOException {
		int a = this.nextInt();
		int b = this.nextInt();
		int mul = 1;
		while( mul * 10 <= a )
			mul *= 10;
		int res = 0;
		for ( int i = a; i < b; i ++ ){
			int m = i;
			HashSet< Integer > exist = new HashSet< Integer >();
			for ( int j = 1; j < mul; j *= 10 ){
				m = ( m % 10 ) * mul + m / 10;
				if ( m > i && m <= b && !exist.contains( m ) ){
					exist.add( m );
					res ++;
				}
			}
		}
		writer.println( res );
	}

	public static void main(String[] args) {
		new Recycled_Numbers().run();
	}

	BufferedReader reader;
	StringTokenizer tokenizer;
	PrintWriter writer;

	public void run() {
		try {
			if (localDebug) {
				reader = new BufferedReader(new InputStreamReader(System.in));
				writer = new PrintWriter(new OutputStreamWriter(System.out));
			} else {
				writer = new PrintWriter(new BufferedWriter(new FileWriter(
						"C-small-attempt0.out")));
				reader = new BufferedReader(new FileReader(
						"C-small-attempt0.in"));
			}
			tokenizer = null;
			int t = this.nextInt();
			for (int i = 1; i <= t; i++) {
				writer.print("Case #" + i + ": ");
				solve();
			}
			reader.close();
			writer.close();
		} catch (Exception e) {
			e.printStackTrace();
			System.exit(1);
		}
	}

	boolean hasNext() throws IOException {
		while (tokenizer == null || !tokenizer.hasMoreTokens()) {
			String nextLine = reader.readLine();
			if (nextLine == null)
				return false;
			tokenizer = new StringTokenizer(nextLine);
		}

		return true;
	}

	int nextInt() throws IOException {
		return Integer.parseInt(nextToken());
	}

	long nextLong() throws IOException {
		return Long.parseLong(nextToken());
	}

	double nextDouble() throws IOException {
		return Double.parseDouble(nextToken());
	}

	String nextLine() throws IOException {
		return reader.readLine();
	}

	String nextToken() throws IOException {
		while (tokenizer == null || !tokenizer.hasMoreTokens()) {
			tokenizer = new StringTokenizer(reader.readLine());
		}

		return tokenizer.nextToken();
	}

	BigInteger nextBigInteger() throws IOException {
		while (tokenizer == null || !tokenizer.hasMoreTokens()) {
			tokenizer = new StringTokenizer(reader.readLine());
		}

		return new BigInteger(tokenizer.nextToken());
	}
}