MAYBE
37.43/10.34	MAYBE
37.43/10.34	
37.43/10.34	Problem:
37.43/10.34	 a(x1) -> x1
37.43/10.34	 a(a(x1)) -> a(b(x1))
37.43/10.34	 b(x1) -> x1
37.43/10.34	 c(b(x1)) -> a(b(c(c(x1))))
37.43/10.34	
37.43/10.34	Proof:
37.43/10.34	 Open
37.43/10.34	EOF