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

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

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

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

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