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

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

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

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

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