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

public class WordReader extends BufferedReader {
	
	public WordReader(Reader in) {
		this(in, 1024);
	}
	
	public WordReader(Reader in, int bufferSize) {
		super(in, bufferSize);
	}
	
	public String readWord() throws IOException {
		StringBuilder sb = new StringBuilder();
		while(true) {
			int c = this.read();
			if (c == -1) { // end of stream
				if (sb.length() == 0) return null;
				return sb.toString();
			} else if (!Character.isWhitespace((char)c)) {
				sb.append((char)c);
			} else if (Character.isWhitespace((char)c) && sb.length() > 0) {
				return sb.toString();
			}
		}
	}
}