假设以块链结构（block linked）表示串，试编写将串S插入到串T某个字符之后的算法，若该字符不存在，则将串S联接在串T之后-Which means that the string is assumed to block chain structure (Block linked), try to write the string S is inserted into a character string T algorithm, if the character does not exist, then the string S is coupled in series T