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

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

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

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

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