Question: 4. Let S = {1, #} and let Y = {ww = 11#12#... #1 for k > 0, and each r; 1, and 07x; for

4. Let S = {1, #} and let Y = {ww = 11#12#... #1 for k > 0, and each r; 1", and 07x; for i + j} Prove that Y is not regular using the pumping lemma
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