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

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

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

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

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