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

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

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

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

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