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

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

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

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

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