195.83/50.08	MAYBE
195.83/50.08	
195.83/50.08	Problem:
195.83/50.08	 a(x1) -> b(x1)
195.83/50.08	 a(a(b(c(x1)))) -> c(c(a(a(a(a(x1))))))
195.83/50.08	
195.83/50.08	Proof:
195.83/50.08	 Open
195.83/50.08	EOF