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

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

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

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

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