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

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

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

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

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