用于查找一个字符串中给定子串出现的次数，并输出删除给定子串后的原串-Find a string in the string appears to the stator frequency and the output will be deleted after the substring of the original string

构造compressed suffix trie class，并且实现findString()和findLongestCommonSubsequence()功能-implement the compact representation of the compressed suffix trie ADT for DNA analyses.