L64: [1, 2; 3], [4, 8; 12], [5, 10; 15], [6, 11; 13], [7, 9; 14], [16, 32; 48], [17, 34; 51], [18, 35; 49], [19, 33; 50], [20, 40; 60], [21, 42; 63], [22, 43; 61], [23, 41; 62], [24, 44; 52], [25, 46; 55], [26, 47; 53], [27, 45; 54], [28, 36; 56], [29, 38; 59], [30, 39; 57], [31, 37; 58]
