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

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

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

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

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