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

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

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

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

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