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

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

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

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

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