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