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