[HELP] String Manipulation

hi all
i hve a little problem..
i wanna make simple function to generate/manipulate a string.

Example :
Input string :
vbforums
Output string must be :
v.bforums
vb.forums
vbf.orums
vbfo.rums
vbfor.ums
vbforu.ms
vbforum.s
v.b.forums
v.bf.orums
v.bfor.ums
..etc as posible string(no double)

look simple but a confused with this :mad:

please someone help me:wave: