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

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

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

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

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