L3, M3, D4, F4, K4, L4, M4, C5, E5, G5, K5, L5, M5, C6, E6, G6, K6, L6, C7, D7, E7, F7, G7, K7, L7, F8, G8, H8, I8, J8, K8, L8, F9, G9, H9, I9, J9, K9, F10, G10, H10, I10, J10, K10, F11, G11, H11, I11, J11, K11, E12, G12, I12, K12,
M1, L2, M2, D8, E8, E9, E10, E11,
D3, F3, D6, F6, B7, E13, G13, I13, K13, E14, G14, I14, K14,
A15, B15, C15, D15, E15, F15, G15, H15, I15, J15, K15, L15, M15, N15, O15,