title: How to remove substring from suffix tree?
body: <p>I reviewed a lot of literature, but I dont found any information about deleting or insertion substrings into suffix tree. There are only Ukkonen's or McCreight's algorithms for building tree.<br />
  The poorest way is to rebuild tree after deleting or inserting a substring. But I think that exists a best way to do it.<br />
  For example (positions are counted from 0): <br />
     I have suffix tree with "abcdef" and I need to delete symbols from 1 to 3. And then I will have suffix tree with "aef". And then I need to add from position 1 string "as". And after this I will have suffix tree with "aasef".
  Can you help me?</p>