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Give a natural PDA and a CFG for the language { a m b n c s d t : m+n=s+t, m,n,s,t 0} For example,
Give a natural PDA and a CFG for the language { am bn cs dt : m+n=s+t, m,n,s,t 0} For example, aacd and abbbccdd are in the language.
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