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

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

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

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

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