2.12/1.42	YES
2.12/1.42	
2.12/1.43	Proof:
2.12/1.43	This system is confluent.
2.12/1.43	By \cite{GNG13}, Theorem 9.
2.12/1.43	This system is of type 3 or smaller.
2.12/1.43	This system is deterministic.
2.12/1.43	This system is weakly left-linear.
2.12/1.43	System R transformed to optimized U(R).
2.12/1.43	This system is orthogonal.
2.12/1.43	
4.18/1.88	EOF