Thread: Kleene star 2

Exhibit languages A and B such that neither is a subset of the other, but the kleene star of A=the Kleene star of B. How does that works?
Any help will be appreciated.

Hint:

There is an example with A and B languages over the singleton alphabet {|}, and |A|=|B|=2.

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proxximus

A={empty string, a , b} and B={a, b , ab}
Are those two statisfy that A and B are neither is a subset of the other, but A star = B star?
What is singleton aplhabet?