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

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

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

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

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