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

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

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

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

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