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

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

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

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

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