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

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

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

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

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