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

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

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

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

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