(0 20 2)(1 6 3)(4 8 7)(5 17 15 12 10)(9 19 14 13 11)(16 21 18)
ALLOWS (11/8)-SEQUENCE
1: (0 12 17)

(0 15 12 20 2)(1 6 3)(4 8 7)(5 17 10)(9 19 14 13 11)(16 21 18)
2: (9 19 14)

(0 15 12 20 2)(1 6 3)(4 8 7)(5 17 10)(9 13 11)(14)(16 21 18)(19)
3: (16 21 18)

(0 15 12 20 2)(1 6 3)(4 8 7)(5 17 10)(9 13 11)(14)(16)(18)(19)(21)
4: (12 20 15)

(0 15 2)(1 6 3)(4 8 7)(5 17 10)(9 13 11)(12)(14)(16)(18)(19)(20)(21)