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

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

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

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

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