MAYBE
128.32/55.30	MAYBE
128.32/55.30	
128.32/55.30	Problem:
128.32/55.30	 a(x1) -> b(x1)
128.32/55.30	 a(b(x1)) -> c(a(c(a(x1))))
128.32/55.30	 c(b(c(x1))) -> b(x1)
128.32/55.30	
128.32/55.30	Proof:
128.32/55.30	 Open
128.32/55.30	EOF