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

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

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

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

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