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

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

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

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

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