Finding maximal substring

[guhanrv]

Dear @ikegami-yukino,

I was wondering if there was a way to find maximal substring of query string given the FM index?

For example,

If the query is "IGPIVEGAGRE", and the FM Index contains "TIVEGAGRT", then it would return "IVEGAGR" and location (1)?

I am thinking this would involve building a bwt/fm index of both query and db and comparing, but not sure how to do this?
Thank you very much!