There should be at least 2 to 3 inches open on either side and the back should be completely open and unobstructed.
Ekwesiri ịdị ma ọ dịkarịa ala sentimita abụọ na-emeghe n'akụkụ abụọ ma azụ ga-emeghe kpamkpam na enweghị ihe ọ bụla.