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