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