Browsers in Lite

[Searchernow]

Randomboy in this thread offered command llnes for adding SeaMonkey to Synaptic.
Is that information given correct?
I did enter those command lines, now I cannot open Synaptic - I get the following:

An error occurred..

E: Type ‘“ndeb’ is not known on line 20 in source list /etc/apt/sources.list
E: The list of sources could not be read.
Go to the repository dialogue to correct the problem.
E: _cache->open() failed, please report.


I then tried to "Install Updates" and got the following:

===========================
Install Updates Error log
===========================
Install Updates could not fetch the package cache information lists.
Go to https://www.freecinema2022.gq/forums/ and paste the log below into a new or existing thread for assistance.

============ Log ===========

E: Type ‘“ndeb’ is not known on line 20 in source list /etc/apt/sources.list
E: The list of sources could not be read.

How do I get out of this?