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

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

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

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

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