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

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

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

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

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