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

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

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

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

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