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

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

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

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

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