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

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

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

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

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