B2, C2, G2, H2, L2, M2, A3, D3, F3, H3, I3, K3, N3, A4, E4, F4, G4, H4, I4, J4, N4, A5, N5, B6, E6, F6, G6, H6, I6, J6, M6, B7, E7, G7, H7, I7, J7, M7, C8, E8, G8, H8, I8, J8, L8, E9, F9, G9, H9, I9, J9, E10, G10, H10, I10, J10, F11, G11, H11, I11, G13, H13, E15, F15, G15, H15, I15, J15,
D4, K4, D5, E5, F5, G5, H5, I5, J5, K5, D9, K9, G12, H12, F14, G14, H14, I14,