3.07/1.67	YES
3.07/1.67	
3.07/1.67	Proof:
3.29/1.69	This system is confluent.
3.29/1.69	By \cite{GNG13}, Theorem 9.
3.29/1.69	This system is of type 3 or smaller.
3.29/1.69	This system is deterministic.
3.29/1.69	This system is weakly left-linear.
3.29/1.69	System R transformed to optimized U(R).
3.29/1.69	This system is orthogonal.
3.29/1.69	
4.17/2.20	EOF