前后颠倒输入的英文中的单词位置，标点符号（只可以出现在句尾）位置不变，如输入"my name is guo hua!"输出应该为"hua guo is name my!"。-Reversed input word of English, punctuation (can only occur in the other end) position unchanged, such as input, "my name is guo hua!"The output should be as "hua guo is the name my!".