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

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

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

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

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