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

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

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

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

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