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

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

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

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

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