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

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

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

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

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