m
=nTc @ s, d k Z d k Z d e f d YZ d e f d YZ d e f d YZ d e f d YZ d e f d
YZ d f d YZ d
e f d YZ d e f d YZ
d f d YZ d f d YZ d f d YZ
d f d YZ d Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d! f d"