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

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

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

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

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