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

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

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

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

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