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

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

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

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

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