MAYBE
53.72/22.12	MAYBE
53.72/22.12	
53.72/22.12	Problem:
53.72/22.12	 a(x1) -> b(c(x1))
53.72/22.12	 a(b(b(x1))) -> c(a(a(a(x1))))
53.72/22.12	 c(c(x1)) -> x1
53.72/22.12	
53.72/22.12	Proof:
53.72/22.12	 Open
53.72/22.13	EOF