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

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

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

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

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