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(4, 18, 2) ALL distance distributions
(2, 18, 2) has 1 possible DDs: {[2, 8, 8]}
(3, 18, 2) has 3 possible DDs: {[0, 6, 6, 6], [1, 3, 9, 5], [2, 0, 12, 4]}
(4, 18, 2) has 9 possible DDs: {[0, 0, 12, 0, 6], [0, 1, 9, 3, 5], [0, 2, 6, 6, 4], [0, 3, 3, 9, 3], [0, 4, 0, 12, 2], [1, 0, 6, 8, 3], [1, 1, 3, 11, 2], [1, 2, 0, 14, 1], [2, 0, 0, 16, 0]}