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

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

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

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

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