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

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

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

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

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