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.*;
import java.math.*;
import java.util.*;
import java.text.*;
import java.util.regex.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;
import static java.lang.Integer.*;
import static java.lang.Double.*;
import static java.lang.Character.*;


public class C {
	
	static class Pair {
		int a, b;

		public Pair(int a, int b) {
			super();
			this.a = a;
			this.b = b;
		}

		@Override
		public int hashCode() {
			final int prime = 31;
			int result = 1;
			result = prime * result + a;
			result = prime * result + b;
			return result;
		}

		@Override
		public boolean equals(Object obj) {
			if (this == obj)
				return true;
			if (obj == null)
				return false;
			if (getClass() != obj.getClass())
				return false;
			Pair other = (Pair) obj;
			if (a != other.a)
				return false;
			if (b != other.b)
				return false;
			return true;
		}
	}

	Object solve() {
		String As = sc.next();
		int l = As.length();
		int A = parseInt(As);
		int B = sc.nextInt();
	
		int ml = (int)pow(10,l-1);
		HashSet<Pair> used = new HashSet<Pair>();
		
		for (int n = A; n < B; n++) {
			int m = n;
			for (int i = 0; i < l; i++) {
				m = m/10 + (m%10)*ml;
				if (n < m && m <= B)
					used.add(new Pair(n,m));
			}
		}
		
		return used.size();
	}

	private static Scanner sc; private static PrintWriter fw;

	public static void main(String[] args) throws Exception {
		String inFile;
//		inFile = "input.txt";
		inFile = "C-small-attempt0.in";
//		inFile = "A-large.in";
		
//		sc = new Scanner(System.in);
		sc = new Scanner(new FileInputStream(inFile));
		
		fw = new PrintWriter(new FileWriter("output.txt", false));

		
		int N = sc.nextInt();
		sc.nextLine();
		
		for (int cas = 1; cas <= N; cas++) {
			fw.print("Case #" + cas + ": ");
//			fw.println("Case #" + cas + ": ");
			Object res = new C().solve();
			if (res instanceof Double) 
				fw.printf("%.10f\n", res);
			else
				fw.printf("%s\n", res);
			fw.flush();
		}
		fw.close();
		sc.close();
	}

}
