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