what does the list look like before the auto-completion?
do you want to change existing entries, or do you want the script to multiply the string "foo/booster/tang_.xyz" with given additions?
always fro a to h, always from 1 to 150?
seems you're looking at 2 loops inside of each other, the outer from 1 to 150, the inner from a to h.
do you want to do this is in bash?
actually, whichever (scripting) language you choose, show us what you got, we will help you make it better.