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.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;


public class C {

	public static ArrayList<String> toArray(String number){
		ArrayList<String> array = new ArrayList<String>();	
		char[] numbers = number.toCharArray();
		
		for (int i=0; i<number.length(); i++)
			array.add(new String(numbers[i]+""));

		return array;
	}
	
	
	public static boolean isPossible(ArrayList<String> array1, ArrayList<String> array2){
		String number1="";
		String number2="";
	
		for (int i=0; i<array1.size(); i++)
			number1 = number1.concat(array1.get(i).toString());
		
		int n1 = Integer.parseInt(number1);
				
		for (int j=0; j<array2.size(); j++){
			number2="";
			for (int m=0; m<array2.size(); m++)
				number2 = number2.concat(array2.get(m).toString());

			if (!number2.startsWith("0")){
				int n2 = Integer.parseInt(number2);
	
				if (n1 == n2)
					return true;
			}
			
			String lastElement = array2.get(array2.size()-1);
			array2.add(0, lastElement);
			array2.remove(array2.size()-1);
		}
		
		return false;
	}
	
	
	
	public static void main(String[] args) throws IOException  {
		Scanner in = new Scanner(new FileReader("C-small-attempt5.in"));
		FileWriter output = new FileWriter("C-small-output.txt");
		String line = in.nextLine();
		ArrayList<String> array1;
		ArrayList<String> array2;
		String number1, number2;
		int n = Integer.parseInt(line);
		int pairs, n1, n2;

		for (int i = 0; i < n; i++) {
			n1 = in.nextInt();
			n2 = in.nextInt();
			pairs = 0;

			for (int j=n1; j<n2; j++){
				number1 = String.valueOf(j);
				
				for (int k=j+1; k<=n2; k++){
					number2 = String.valueOf(k);	
					array1 = toArray(number1);
					array2 = toArray(number2);
					
					if (isPossible(array1, array2))
						pairs++;
				}
			}
			
			output.write("Case #" + (int) (i+1) +": " + pairs + "\n");
		}
		
		output.close();
	}
}
