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.util.List;
import java.util.ArrayList;
import java.util.Scanner;
import java.util.Set;
import java.util.HashSet;
import java.io.*;

public class Rec {
	public static void main(String args[]) throws IOException {
		//Scanner in = new Scanner(System.in);
		//int n = in.nextInt();
		//in.nextLine();
		
		BufferedReader br = new BufferedReader(new FileReader("C-small-attempt0.in"));
		PrintWriter pw = new PrintWriter("output1.in");
		
		String sss = "";
		sss = br.readLine();
		
		int num = Integer.parseInt(sss);
		
		List<String> l = new ArrayList<String>();
		
		while((sss = br.readLine()) != null)
			l.add(sss);
		
		int count = 0;
		
		for (String s : l) {
			count++;
			
			Set<String> set = new HashSet<String>();
			
			String val[] = s.split(" ");
			int rear = Integer.parseInt(val[0]);
			int max = Integer.parseInt(val[1]);
			
			if (String.valueOf(rear).length() == 1) {
				if (count == 0)
					pw.print("Case #" + count + ": " + 0);
					//System.out.print("Case #" + count + ": " + 0);
				else
					pw.print("\n" + "Case #" + count + ": " + 0);
					//System.out.print("\n" + "Case #" + count + ": " + 0);
			} else {
				int len = String.valueOf(rear).length();
				
				for (int c = rear; c <= max; c++) {
					String ss = String.valueOf(c);
					for (int u = 1; u < len; u++) {
						String sub = ss.substring(u);
						int f_s = Integer.parseInt(String.valueOf(sub.charAt(0)));
						
						if (f_s > Integer.parseInt(String.valueOf(String.valueOf(max).charAt(0))))
							continue;
						if (f_s == 0)
							continue;
							
						sub = sub.concat(ss.substring(0,u));
						
						if ((Integer.parseInt(sub) > c) && (Integer.parseInt(sub) <= max))
							if (c < Integer.parseInt(sub) && c >= rear) {
								set.add(String.format("%s %s", c, sub));
							}
					}
				}
				
				if (count == 0)
					pw.print("Case #" + count + ": " + set.size());
					//System.out.print("Case #" + count + ": " + set.size());
				else
					pw.print("\n" + "Case #" + count + ": " + set.size());
					//System.out.print("\n" + "Case #" + count + ": " + set.size());
				pw.flush();
			}
		}
		
		pw.close();
		
	}
}