197.41/50.47	MAYBE
197.41/50.47	
197.41/50.47	Problem:
197.41/50.47	 c(a(a(c(x1)))) -> a(a(a(x1)))
197.41/50.47	 b(x1) -> a(c(a(x1)))
197.41/50.47	 a(b(a(x1))) -> b(b(x1))
197.41/50.47	
197.41/50.47	Proof:
197.41/50.47	 Open
197.41/50.47	EOF