N ZN N NN ZN NXXHXXXXXXXXEXXXMXHXXXXXX H H M H N MN H M H N M H M H NN H H MMMMMMMMMMM H MMMM HNNT NN NN N H MX N HMMNMHMMMM N H X N N H HN NR H N XMMMMMMHMMMMHMMMNMMMMMHMMMM X H M H NX H M H X H MTTHTTTTNTTTTTTTTTTT H M H NM HX H M HTTTTTTTT H H H M N H H H MMMMMMMNM H E H HMMMMMNN H