196.30/50.23	MAYBE
196.30/50.23	
196.30/50.23	Problem:
196.30/50.23	 c(c(x1)) -> b(b(x1))
196.30/50.23	 a(b(x1)) -> a(c(b(x1)))
196.30/50.23	 b(a(x1)) -> b(b(x1))
196.30/50.23	 b(c(x1)) -> c(a(a(x1)))
196.30/50.23	
196.30/50.23	Proof:
196.30/50.23	 Open
196.40/50.24	EOF