(6 6 6 -6) -6 6 (-5 -5 5 -5) 6 6(6 6 -6* 7*) -7 -7(6 7* -8 8 -8 -7) -7(-7 -7 7 -6 6 -7 6 5) -4 -3(-4 4 -5 -6 6 -7 -8 8 -8 7* -7)