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

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

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

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

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