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

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

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

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

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