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

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

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

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

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