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

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

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

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

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