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

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

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

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

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