(spac) = (spac) (tabu) = (tabu) (line) = (line) (lpar) = (lpar) (rpar) = (rpar) (is void (void)) = (yes) (is spac (spac)) = (yes) (is tabu (tabu)) = (yes) (is line (line)) = (yes) (is lpar (lpar)) = (yes) (is rpar (rpar)) = (yes)