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

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

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

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

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