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

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

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

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

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