import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
import java.io.*;
import java.util.*;

public class RecycledNumbers {
	
	String shift(String a) {
		return a.substring(1) + a.charAt(0);
	}
	
	void solve() throws Exception {
		int a = nextInt();
		int b = nextInt();
		int length = (b + "").length();
		Set<Integer> set = new HashSet<Integer>();
		int ans = 0, eq = 0;
		for (int i = a; i <= b; i++) {
			String s = i + "";
			set.clear();
			for (int j = 0; j < length; j++) {
				int t = Integer.parseInt(s);
				if (t >= a && t <= b && t != i) {
					set.add(t);
				}
				s = shift(s);
			}
			ans += set.size();
		}
		out.println(ans / 2);
	}

	void run() {
		try {
			in = new BufferedReader(new FileReader("input.txt"));
			out = new PrintWriter("output.txt");
			int tests = nextInt();
			for (int i = 0; i < tests; i++) {
				out.print("Case #" + (i + 1) + ": ");
				solve();
				System.err.println("test " + (i + 1));
			}
			out.close();
		} catch (Exception e) {
			e.printStackTrace();
			System.exit(1);
		}
	}

	BufferedReader in;
	StringTokenizer st;
	PrintWriter out;
	final String filename = new String("RecycledNumbers").toLowerCase();

	String nextToken() throws Exception {
		while (st == null || !st.hasMoreTokens())
			st = new StringTokenizer(in.readLine());
		return st.nextToken();
	}

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

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

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

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

}
