private static String stringFromStandardInput(Charset cs) throws IOException {
        int BUFFER_SIZE = 10;
        ReadableByteChannel in = Channels.newChannel(System.in);
        ByteBuffer bb = ByteBuffer.allocate(10);
        StringBuilder sb = new StringBuilder();
        while(bb.hasRemaining()) {
            if(in.read(bb) > bb.remaining()){
                BUFFER_SIZE *= 2;
                ByteBuffer bb_ = ByteBuffer.allocate(BUFFER_SIZE);
                bb_.put(bb);
                bb = bb_;
            }
        }
        bb.flip();
        sb.append(cs.decode(bb));
        bb.clear();
        return sb.toString();
    }