#g4 
3	% generator
 0 1 0
 1 0 0
 0 0 1
3	% generator
 -1  0 0
  0 -1 0
  0  0 1
3	% generator
 1 0 1
 0 1 0
 0 0 1
3	% generator
 1 0 0
 0 1 1
 0 0 1
