197.54/50.50	MAYBE
197.54/50.50	
197.54/50.50	Problem:
197.54/50.50	 s(b(x1)) -> b(s(s(s(x1))))
197.54/50.50	 s(b(s(x1))) -> b(t(x1))
197.54/50.50	 t(b(x1)) -> b(s(x1))
197.54/50.50	 t(b(s(x1))) -> u(t(b(x1)))
197.54/50.50	 b(u(x1)) -> b(s(x1))
197.54/50.50	 t(s(x1)) -> t(t(x1))
197.54/50.50	 t(u(x1)) -> u(t(x1))
197.54/50.50	 s(u(x1)) -> s(s(x1))
197.54/50.50	
197.54/50.50	Proof:
197.54/50.50	 Open
197.54/50.51	EOF