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

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

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

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

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