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