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

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

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

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

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