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

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

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

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

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