MAYBE
135.64/55.32	MAYBE
135.64/55.32	
135.64/55.32	Problem:
135.64/55.32	 a(a(x1)) -> b(x1)
135.64/55.32	 a(b(c(x1))) -> c(c(a(a(a(a(x1))))))
135.64/55.32	
135.64/55.32	Proof:
135.64/55.32	 Open
135.64/55.32	EOF