1.90/1.28	YES
1.90/1.28	
1.90/1.28	Proof:
1.90/1.29	This system is confluent.
1.90/1.29	By \cite{GNG13}, Theorem 9.
1.90/1.29	This system is of type 3 or smaller.
1.90/1.29	This system is deterministic.
1.90/1.29	This system is weakly left-linear.
1.90/1.29	System R transformed to optimized U(R).
1.90/1.29	This system is orthogonal.
1.90/1.29	
2.15/1.31	EOF