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

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

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

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

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