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

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

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

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

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