import java.io.*;
import java.util.*;

public class C {

    void solve() throws IOException {
        in("C-large.in"); out("C-large.out");

        long tm = System.currentTimeMillis();
        boolean[] mask = new boolean[2000000];
        int[] r = new int[10];
        int t = readInt();
        for (int cs = 1; cs <= t; ++cs) {
            int a = readInt();
            int b = readInt();
            int ans = 0;
            for (int m = a + 1; m <= b; ++m) {
                char[] d = String.valueOf(m).toCharArray();
                int c = 0;
                for (int i = 1; i < d.length; ++i) {
                    if (d[i] != '0' && d[i] <= d[0]) {
                        int n = 0;
                        for (int j = 0; j < d.length; ++j) {
                            int jj = i + j;
                            if (jj >= d.length) jj -= d.length;
                            n = n * 10 + (d[jj] - '0');
                        }
                        if (n >= a && n < m && !mask[n]) {
                            ++ans;
                            mask[n] = true;
                            r[c++] = n;
                        }
                    }
                }
                for (int i = 0; i < c; ++i) {
                    mask[r[i]] = false;
                }
            }
            println("Case #" + cs + ": " + ans);
            //System.out.println(cs);
        }
        System.out.println("time: " + (System.currentTimeMillis() - tm));
        exit();
    }

    void in(String name) throws IOException {
        if (name.equals("__std")) {
            in = new BufferedReader(new InputStreamReader(System.in));
        } else {
            in = new BufferedReader(new FileReader(name));
        }
    }

    void out(String name) throws IOException {
        if (name.equals("__std")) {
            out = new PrintWriter(System.out);
        } else {
            out = new PrintWriter(name);
        }
    }

    void exit() {
        out.close();
        System.exit(0);
    }

    int readInt() throws IOException {
        return Integer.parseInt(readToken());
    }

    long readLong() throws IOException {
        return Long.parseLong(readToken());
    }

    double readDouble() throws IOException {
        return Double.parseDouble(readToken());
    }

    String readLine() throws IOException {
        st = null;
        return in.readLine();
    }

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

    boolean eof() throws IOException {
        return !in.ready();
    }

    void print(String format, Object ... args) {
        out.println(new Formatter(Locale.US).format(format, args));
    }

    void println(String format, Object ... args) {
        out.println(new Formatter(Locale.US).format(format, args));
    }

    void print(Object value) {
        out.print(value);
    }

    void println(Object value) {
        out.println(value);
    }

    void println() {
        out.println();
    }

    StringTokenizer st;

    BufferedReader in;
    PrintWriter out;

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

import java.io.*;

public class RecycledNumbers {


	public static void main(String[] args) {

		BufferedReader in;
		BufferedWriter out;
		int T, i;
		String line;
		

		try {
			in = new BufferedReader(new FileReader("input.txt"));
			out = new BufferedWriter(new FileWriter("output.txt"));
		} catch (FileNotFoundException e) {
			System.out.println(e.getMessage());
			return;
		} catch (IOException e) {
			System.out.println(e.getMessage());
			return;
		}

		try {
			T = Integer.parseInt(in.readLine());

			for (i = 0; i < T; i++) {
				line = in.readLine();

				String lineToWrite = "Case #" + (i+1) + ": ";

				lineToWrite += String.valueOf(solve(line));

				out.write(lineToWrite + "\n");

			}
			in.close();
			out.close();
		} catch (IOException e) {
			System.out.println(e.getMessage());
			return;
		}
	}

	public static int solve(String input) {
		int a, b, counter;
		String[] inputs = input.split(" ");
		a = Integer.parseInt(inputs[0]);
		b = Integer.parseInt(inputs[1]);
		counter = 0;

		for (int n = a; n < b; n++) {

			int i;
			for (i = 10; i < b; i *= 10) {
				int m = split(n, i);

				if (m > n && m <= b) counter++;

			}


		}
		return counter;

	}
	
	public static int split(int num, int pow) {
		int half1, half2;
		half1 = num/pow;
		half2 = (num%pow) * (orderOf(num) / pow);
		return half1 + half2;
	}
	
	public static int orderOf(int num) {
		int i = 1;
		while (i < num) {
			i*=10;
		}
		return i;
	}
}
