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

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

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

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

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