简单的马尔科夫算法，Markov链数据提供了有当前状态决定，而又独立于当前状态的序列，此处算法是将给定的文本串生成新的随机文本- Simple Sample of a Markov Chain Algorithm：A markov chain is a sequence of random variables in which the future variable is determined by the present variable but is independent of the way in which the present state arose from its predecessors. The code is a simple example of a markov chain that generates somewhat random text output from a given text input.