I dnt undastand a sheet here
I feel that I should point out that you weren't replying to Byelorussian's post, but to another reply that was deleted by me a few hours later.
That reply was made by a spam account, not sure if it's a bot but sadly they do show up here now and then. Usually these accounts bump a random thread from years ago with a very generic copy&paste text ("This is a very interesting topic" or such).
Please use the Report To Moderator option if you see any suspect posts, so we can investigate and add them to the ban list if necessary.