2.00/1.31	YES
2.00/1.31	
2.00/1.31	Proof:
2.00/1.31	This system is confluent.
2.00/1.31	By \cite{GNG13}, Theorem 9.
2.00/1.31	This system is of type 3 or smaller.
2.00/1.31	This system is deterministic.
2.00/1.31	This system is weakly left-linear.
2.00/1.31	System R transformed to optimized U(R).
2.00/1.31	This system is orthogonal.
2.00/1.31	
2.00/1.34	EOF