s 3 1
s 2 1
s 2 2
s 1 1
( 1 + α 2 1 + α 3 1 , 1 + α 1 1 + α 3 1 , 0 )
( 0 , 0 , 0 )
s 1 2
( 0 , 0 , 1 + α 1 2 + α 2 2 )
s 3 2
( 0 , 0 , 1 + α 1 1 + α 2 1 )
( 1 + α 2 2 + α 3 2 , 1 + α 1 2 + α 3 2 , 0 )