193.10/49.36	MAYBE
193.10/49.36	
193.10/49.36	Problem:
193.10/49.36	 a(x1) -> b(b(x1))
193.10/49.36	 b(b(c(x1))) -> c(b(c(a(x1))))
193.10/49.36	 c(c(x1)) -> x1
193.10/49.36	
193.10/49.36	Proof:
193.10/49.36	 Open
193.43/49.37	EOF