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

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

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

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

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