_Test_4d
0 -   (1 = )
1 -  (1 = )
1 -  (1 = )
4 -  
A=0 B=0 C=0 D=0 
A -> C= 2
B -> D= 2 
C -> A= 2 D= 1 
D -> C= 1 B= 2 


