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

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

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

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

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