#####
##### Masaaki Harada, Akihiro Munemasa
#####

> W_12_5 := Matrix(12,12,[
> [1,1,-1,-1,1,0,0,0,0,0,0,0],
> [0,0,0,0,0,0,1,0,1,-1,-1,1],
> [1,-1,1,0,1,-1,0,0,0,0,0,0],
> [0,0,0,0,0,0,1,1,-1,-1,1,0],
> [0,0,0,0,0,0,1,-1,-1,1,0,1],
> [0,1,1,1,1,1,0,0,0,0,0,0],
> [1,0,1,-1,-1,1,0,0,0,0,0,0],
> [0,0,0,0,0,0,1,-1,1,0,1,-1],
> [1,-1,-1,1,0,1,0,0,0,0,0,0],
> [1,1,0,1,-1,-1,0,0,0,0,0,0],
> [0,0,0,0,0,0,1,1,0,1,-1,-1],
> [0,0,0,0,0,0,0,1,1,1,1,1]
> ]):

> writeto("W12.6.txt");