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