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

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

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

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

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