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

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

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

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

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