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

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

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

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

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