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