4. Prove the following two languages are context-free: (1) {a*b°c*d° | n2 0}

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4. Prove the following two languages are context-free:
(1) {a*b°c*d° |n> 0}
(2) {waw | w e{a,b}*}. In other words, we want odd length palindromes with a in the
middle.
Transcribed Image Text:4. Prove the following two languages are context-free: (1) {a*b°c*d° |n> 0} (2) {waw | w e{a,b}*}. In other words, we want odd length palindromes with a in the middle.
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