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

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

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

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

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