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

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

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

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

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