Known String - Sequential Loop

[fortress]

I've spent a fair amount of time trying to find the answer before reaching out, but maybe someone can help me out. 

I need a specific mask/attack based on the following. 
I know the password is derived from a specific set of characters, in a specific order. But I'd like to loop through all possibilities, for example:

If the complete string is: *j?nXt*WR9?e>o>
I would like to cycle through
*
*j
*j?
....etc.

Further, then I would like to begin with the second character:
j
j?
j?n
....etc. 
Continuing on of course with each next character in the string.  
This would be easy enough to do manually, however the string is 120+ characters.
If there's a specific term or thread that has already explained this, I would appreciate a pointer. 

Thanks!