(0 20 4)(1 13 11 9 6)(2 15 3)(5 19 10 8 7)(12 17 14)(16 21 18)
ALLOWS (11/8)-SEQUENCE
1: (1 7 10)
(0 20 4)(1 8 7 13 11 9 6)(2 15 3)(5 19 10)(12 17 14)(16 21 18)
2: (6 11 9)
(0 20 4)(1 8 7 13 11)(2 15 3)(5 19 10)(6)(9)(12 17 14)(16 21 18)
3: (5 19 10)
(0 20 4)(1 8 7 13 11)(2 15 3)(5)(6)(9)(10)(12 17 14)(16 21 18)(19)
4: (1 8 11)
(0 20 4)(1)(2 15 3)(5)(6)(7 13 11)(8)(9)(10)(12 17 14)(16 21 18)(19)