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

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

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

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

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