How use ListSFTP to find particular file when same name on different path

[#1]

our files:

path/sas/a.text

path/sas/b.text

path/sas//bas/a.text

path/sas/bas/b.text

how use File Filter Regex and Path Filter Regex to find path/sas/a.text and path/sas/bas/b.text ?

there are my filter, I always got four files.

File Filter Regex:  a.text|b.text

Path Filter Regex: path/sas|path/sas/bas

[#2]

Thanks, it's help me a lot.