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.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.util.HashSet;
import java.util.Scanner;

import javax.management.RuntimeErrorException;

public class C {

	public static void main(String[] args) throws FileNotFoundException {
		Scanner sc = new Scanner(new FileInputStream("C-small-attempt0.in"));
		System.setOut(new PrintStream(new FileOutputStream("c.out")));
		C c = new C();
		long start = System.currentTimeMillis();
		int t = sc.nextInt();
		for (int i = 0; i < t; i++)
			System.out.println("Case #" + (i + 1) + ": "
					+ c.solve(sc.nextInt(), sc.nextInt()));
		long end = System.currentTimeMillis();
//		System.out.println((end - start) / 1000.0);
		// System.out.println("Case #" + (i + 1) + ": " +
		// c.bruteSolve(sc.nextInt(), sc.nextInt()));
	}

	private int compare(String a, String b, int shift) {
		int l = a.length();
		int ai = 0;
		int bi = shift;
		for (int i = 0; i < l; i++) {
			int c = a.charAt(ai) - b.charAt(bi);
			if (c != 0)
				return c;
			ai++;
			bi++;
			if (bi == l)
				bi = 0;
		}
		return 0;
	}

	private String shift(String a, int shift) {
		return a.substring(shift) + a.substring(0, shift);
	}

	private long solve(int a, int b) {
		long count = 0;
		String aStr = a + "";
		String bStr = b + "";
		if (aStr.length() != bStr.length())
			throw new RuntimeException("Need the same length");
		HashSet<String> ready = new HashSet<String>();
		int l = aStr.length();
		for (int i = a; i <= b; i++) {
			ready.clear();
			for (int j = 1; j < l; j++) {
				String iStr = i + "";
				String iShifted = shift(iStr, j);
//				debug("Par: " + iStr + " and " + iShifted);
				if (iShifted.equals(iStr))
					continue; // Get the same
//				debug("1");
				if (iShifted.charAt(0) == '0')
					continue; // has leading zero
//				debug("2");
				if (iShifted.compareTo(aStr) <= 0)
					continue;// smaller than lower bound
//				debug("4");
				if (iShifted.compareTo(iStr) <= 0)
					continue; // smaller than first
//				debug("3");
				if (iShifted.compareTo(bStr) > 0)
					continue;// smaller than great bound
//				debug("5");
				if (ready.contains(iShifted))
					continue;
//				debug("6");
				ready.add(iShifted);
				count++;
			}
		}
		return count;
	}

	private long bruteSolve(int a, int b) {
		long count = 0;
		String aStr = a + "";
		String bStr = b + "";
		if (aStr.length() != bStr.length())
			throw new RuntimeException("Need the same length");

		HashSet<String> ready = new HashSet<String>();
		int l = aStr.length();
		for (int i = a; i <= b; i++)
			for (int j = i + 1; j <= b; j++) {
				ready.clear();
				for (int k = 1; k < l; k++) {
					if (shift(i + "", k).equals(j + "")
							&& !ready.contains(j + "")) {
						ready.add(j + "");
						System.out.println("Pair: " + i + " and " + j);
						count++;
					}
				}
			}
		return count;
	}

}
