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

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

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

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

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