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

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

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

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

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