RepeatMasker: considering only the matches with a specific length

Question

[gabri]

Hello everybody!

I would like to use RepeatMasker to find the position of certain sequences (Library.fasta) on a specific reference (Reference.fasta) using a simple command line like this:

$ RepeatMasker Reference.fasta -lib Library.fasta -s -no_is -nolow -X

The crucial point is: I would like the program to consider significative only the sequences of the library masking against the reference with a percentage greater or equal than 80% of their length.

Are there options for the command line that can make this process possible?

Thanks a lot in advance for any reply!