a) (a+b)* bbbb (a+b)*
b) (a+b)* bb (a+b)*bb
c) bbb(a+b)*
d) bb (a+b)*
The set of all strings over ∑ = {a,b} in which all strings having bbbb as substring is?
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The set of all strings over ∑ = {a,b} in which all strings having bbbb as substring is?
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