Yes of course. If you balanced the parentheses it would be syntactically valid k. It assumes a bunch of names, and would be unlikely to do anything useful, but it would be legal.
The k7/shakti tutorial playfully notes that running one's finger along the shifted top row of the keyboard is syntactically valid.
sdj8340u2u$@(:@#P+_A:@L@#!@)_ZL?> M OW {E)@(
Can a language be invented where this random string I hammered out would be a valid program?