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

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

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

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

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