(b)(aaa...)
Each char can be an a or b, then repeat, not "a repeating seq of either a or b only"
(a|b)* = X* = x1x2x3... where each xi can be "a" or "b"
Each char can be an a or b, then repeat, not "a repeating seq of either a or b only"
(a|b)* = X* = x1x2x3... where each xi can be "a" or "b"