196.49/50.24	MAYBE
196.49/50.24	
196.49/50.24	Problem:
196.49/50.24	 a(c(x1)) -> a(x1)
196.49/50.24	 d(a(x1)) -> a(c(b(c(d(x1)))))
196.49/50.24	 a(c(b(c(x1)))) -> c(b(c(c(x1))))
196.49/50.24	 c(x1) -> b(a(a(x1)))
196.49/50.24	 d(c(x1)) -> a(c(d(a(x1))))
196.49/50.24	
196.49/50.24	Proof:
196.49/50.24	 Open
196.49/50.24	EOF