Equivalence classes are :

{1,-2}
{2}
{3}
{75}


The represents are : 

1

0 1 1 
1 0 0 
1 0 0 


[-1.41421,0,1.41421]



2

0 1 1 
1 0 1 
1 1 0 


[-1,-1,2]



3

0 1 0 
1 0 1 
0 1 1 


[-1.41421,0,1.41421]



75

0 1 
1 0 


[-1,1]

