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

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

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

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

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