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

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

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

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

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