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

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

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

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

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