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

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

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

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

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