题目单词翻转答题地址：http//pkuic.openjudge.cn/ziyoulianxi//AdddcfefacdaddefeafcbbfdeedebbBbccedcebbceedfcabbfaaaabbCdbadaedcfcbfccfecbebadadbeDfcfbaaecadaeddcfbbdfcaaefdedEacaafdbdbffdeccecbbc