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

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

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

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

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