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