['D2D4', 'B3D3', 'C1C3', 'E1C1', 'D3B3', 'A3C3', 'E3E1', 'G3E3', 'C4C2', 'C1C3', 'A4C4', 'C4C2', 'E4C4', 'G4E4', 'E4E2', 'E1E3', 'C5C3', 'C2C4', 'A5C5', 'D5B5', 'E6E4', 'G5E5', 'C7C5', 'C4C6', 'E7C7', 'C7C5', 'B5D5', 'D5F5', 'E3E5', 'F5D5', 'D5D7']