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

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

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

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

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