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

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

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

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

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