[(0, 1, 2, 3, 4, 5, 6), (1, 2, 7, 8, 9, 10, 11), (3, 4, 7, 11, 12, 13, 14), (0, 6, 8, 10, 12, 13, 15), (3, 5, 9, 10, 14, 15, 16), (4, 5, 8, 9, 12, 17, 18), (1, 6, 11, 14, 15, 17, 18), (0, 2, 7, 13, 16, 17, 18)] (if conjecture about Ferrers Diagram Rank-Metric Codes is true: 68721580114)
) : 68721574690