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