D1 D2 D3 D4 target
B  B  D  A  1
C  B  D  A  1
C  D  B  C  0
D  D  D  B  1
B  D  D  A  1
C  D  B  C  0
D  D  B  C  0
B  D  D  A  1
C  D  B  A  0
D  B  B  C  0
D  D  B  C  0
B  B  D  A  1
C  B  D  A  1
C  D  B  C  0
B  D  D  A  1
C  B  D  A  1

