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

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

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

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

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