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

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

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

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

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