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 C implements Runnable {
	private MyScanner in;
	private PrintWriter out;

	private void solve() {
		int a = in.nextInt();
		int b = in.nextInt();
		int mul = 1;
		int pow = 0;
		while (a >= mul * 10) {
			mul *= 10;
			++pow;
		}
		int ans = 0;
		int[] lastSeen = new int[b + 1];
		for (int i = a; i <= b; ++i) {
			if (i == mul * 10) {
				mul *= 10;
				++pow;
			}
			int temp = i;
			for (int j = 0; j < pow; ++j) {
				temp = temp / 10 + mul * (temp % 10);
				if (temp > i && temp <= b && lastSeen[temp] < i) {
					++ans;
					lastSeen[temp] = i;
				}
			}
		}
		out.println(ans);
	}

	@Override
	public void run() {
		in = new MyScanner();
		try {
			out = new PrintWriter(new File("C-large.out"));
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}
		int tests = in.nextInt();
		for (int i = 0; i < tests; ++i) {
			out.print("Case #" + (i + 1) + ": ");
			solve();
		}
		in.close();
		out.close();
	}

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

	class MyScanner {
		private BufferedReader br;
		private StringTokenizer st;

		public MyScanner() {
			try {
				br = new BufferedReader(new FileReader("C-large.in"));
			} catch (FileNotFoundException e) {
				e.printStackTrace();
			}
		}

		public void close() {
			try {
				br.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}

		public boolean hasNext() {
			while (st == null || !st.hasMoreTokens()) {
				try {
					String s = br.readLine();
					if (s == null) {
						return false;
					}
					st = new StringTokenizer(s);
				} catch (IOException e) {
					e.printStackTrace();
					return false;
				}
			}
			return st != null && st.hasMoreTokens();
		}

		private String next() {
			while (st == null || !st.hasMoreTokens()) {
				try {
					String s = br.readLine();
					if (s == null) {
						return null;
					}
					st = new StringTokenizer(s);
				} catch (IOException e) {
					e.printStackTrace();
					return null;
				}
			}
			return st.nextToken();
		}

		public String nextLine() {
			try {
				st = null;
				return br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
				return null;
			}
		}

		public int nextInt() {
			return Integer.parseInt(next());
		}

		public long nextLong() {
			return Long.parseLong(next());
		}

		public double nextDouble() {
			return Double.parseDouble(next());
		}
	}
}