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

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

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

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

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