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

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

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

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

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