hex string to string

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

public class Parser {
	public static int charToNum(char c) {
		if ('A' <= c && c <= 'F') {
			return c - 'A' + 10;
		}
		// 違う場合は全部数字とみなす
		return c - '0';
	}

	public static void main(String... args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		Vector<Byte> bytes = new Vector<Byte>();
		int c1;
		while ((c1 = br.read()) != -1) {
			if (c1 == '\\') {
				int c2 = br.read();
				if (c2 == 'x') {
					int b1 = charToNum((char)br.read());
					int b2 = charToNum((char)br.read());
					bytes.add((byte)(b1 * 16 + b2));
				} else {
					throw new Exception("error");
				}
			} else {
				bytes.add((byte)c1);

			}
		}

		byte[] byteArray = new byte[bytes.size()];
		for (int i = 0; i < byteArray.length; i++) {
			byteArray[i] = bytes.get(i).byteValue();
		}

		System.out.println(new String(byteArray));
	}
}