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

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

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

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

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