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

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

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

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

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