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

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

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

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

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