CS 201 - Ning

The first letter of each word in L is either an a or a b. The second letter of each word in L is either an a or a b. The third letter of each word in L is either an a or a b. So, we may write. L = language ((a+b)(a+b)(a+b)) Or. L = language ((a+b)3) If we want to define the set of all seven-letter strings of a’s and b’s, we could write (a+b)7 . ................
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