Not every non-cyclic finite group has such a relation. E.g., the quaternion group of order 8 doesn't.
(I meant this as a comment on Alex's answer, but I don't have enough reputation to comment.)
Not every non-cyclic finite group has such a relation. E.g., the quaternion group of order 8 doesn't.
(I meant this as a comment on Alex's answer, but I don't have enough reputation to comment.)