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

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

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

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

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