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One student suggested the following algorithm to test a string of a's and b's to see if it is a word in S*, where S={aa
One student suggested the following algorithm to test a string of a's and b's to see if it is a word in S*, where S={aa ba aba abaab}. Step 1, cross off the longest set of characters from the front of the string that is a word in S. Step 2, repeat step 1 until it is no longer possible. If what remains is the string A, the original string was a word in S*.If what remains is not A (this means some letters are left, but we cannot find a word in S at the beginning), the original string was not a word in S*. Find a string that disproves this algorithm
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