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

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

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

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

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