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

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

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

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

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