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

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

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

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

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