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

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

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

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

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