codeforces 208A（Dubstep） Java

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import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * 题意：将输入的字符中所有的"WUB"转换成" "，如果连续的两个或者两个以上"WUB"只需转换成一个" "。
 *
 * @author TinyDolphin
 *         2017/7/3 21:25.
 */
public class Main {

    public static void main(String[] args) throws IOException {
        Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
        PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
        String[] letters;
        while (in.hasNext()) {
            letters = in.next().split("WUB");
            for (int index = 0; index < letters.length; index++) {
                if (!letters[index].equals("")) {
                    out.print(letters[index]);
                    out.print(index == letters.length - 1 ? "n" : " ");
                }
            }
        }
        out.flush();
    }
}