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

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

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

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

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