Attack with known hints (position unknown) + brutforce for other chars

[b8vr]

You could build a mask file.
If you expect digits or lowercase on the unknown locations, you could do something like:
?l?d, jupiter?1?1?1?1?1#
?l?d, jupiter?1?1?1?1#?1
?l?d, jupiter?1?1?1#?1?1
......
?l?d, #?1?1?1jupiter?1?1
......
?l?d, ?1?1?1?1?1#jupiter