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

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

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

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

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