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

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

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

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

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