A1 = 1
A2 = 0
B2 = 1
B1 = 1
A: {{A1, B1}, {A2, B2}}
A4 = 1
A5 = 1
B5 = 1
B4 = 0
B: {{A4, B4}, {A5, B5}}
A8 = 2
B8 = 3
A9 = 3
B9 = 2
A11 = -1
B11 = 3
A12 = 2
B12 = -1
C: {{A8, B8}, {A9, B9}}
D: {{A11, B11}, {A12, B12}}