Fyltrshkn Danlwd Line Vpn Qrmz -

Let me attempt a possible interpretation.

Trying : fyltrshkn → cviqop ehk — still not obvious. fyltrshkn danlwd Line Vpn qrmz

Given the presence of Line Vpn in the middle, maybe the scrambled parts are meant to be "your email" or "username" + "Line VPN" + "password" ? Let me attempt a possible interpretation

It looks like you’ve provided a string of seemingly random characters: fyltrshkn danlwd Line Vpn qrmz

fyltrshkn reversed = nkhsr tlyf → not promising.

But qrmz reversed is zmrq — could be "zero" with a shift?