Question: If L is any regular language, let L_2/3 be the language in which the middle thirds of strings in L are removed: L_2/3 = {xz

If L is any regular language, let L_2/3 be the language

If L is any regular language, let L_2/3 be the language in which the middle thirds of strings in L are removed: L_2/3 = {xz | xyz in L and |x| = |y| = |z|, for some y}. Prove tha6t if L is regular, L_2/3 is not necessarily regular

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