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.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.InputStream;
import java.io.InputStreamReader;

public class RecycledNumbers {
	public static void main(String[] args) {
		try {
			run();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private static void run() throws Exception {
		writeResult(calc(readInputData()));
	}

	private static int[] calc(Data[] data) {
		int[] res = new int[data.length];

		for (int i = 0; i < data.length; i++) {
			res[i] = calc(data[i]);
			// System.out.println("Case #" + (i + 1) + ": " + res[i]);
		}

		return res;
	}

	private static int calc(Data data) {
		if (data.len <= 1)
			return 0;

		int res = 0;

		for (int i = data.a; i < data.b; i++) {
			int pp = (int)Math.pow(10, data.len - 1);

			for (int j = 1, p = 10; j < data.len; j++, p *= 10, pp /= 10) {
				int x = i % p;
				int y = i / p;
				int rev = x * pp + y;

				if (x == y)
					break;
				if (rev > i && rev >= data.a && rev <= data.b)
					res++;
			}
		}

		return res;
	}

	private static Data[] readInputData() throws Exception {
		InputStream in = RecycledNumbers.class.getResourceAsStream("/test.in");
		BufferedReader br = new BufferedReader(new InputStreamReader(in));

		int total = Integer.parseInt(br.readLine());
		Data[] data = new Data[total];

		for (int i = 0; i < total; i++)
			data[i] = new Data(br.readLine().split("\\s"));

		in.close();

		return data;
	}

	private static void writeResult(int[] res) throws Exception {
		BufferedWriter out = new BufferedWriter(new FileWriter("d:\\!!!\\test.out"));

		for (int i = 1; i <= res.length; i++)
			out.write("Case #" + i + ": " + res[i - 1] + "\n");

		out.close();
	}
}

class Data {
	final int len;
	final int a;
	final int b;

	Data(int a, int b) {
		this.a = a;
		this.b = b;
		this.len = 0;
	}

	Data(String[] str) {
		this.a = Integer.parseInt(str[0]);
		this.b = Integer.parseInt(str[1]);

		this.len = str[0].length();
	}

	@Override
	public String toString() {
		return "[" + a + ";" + b + "]";
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + Math.min(a, b);
		result = prime * result + Math.max(a, b);
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Data other = (Data)obj;
		if (a != other.a)
			return false;
		if (b != other.b)
			return false;
		return true;
	}
}
