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

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

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

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

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