Auto Generate Child SKU's based off a list of parent skus and a list of colors

Hello Everyone,

I am in dire need of some help with automating the creation of skus based off the parent sku and the color options. I have attached an example of a simplified version of what I need. Essentially I have a list of parent skus in the 20 to 40k mark, all of these skus respresent one design style I sell for decals. However I need to offer both color and size options for each which all require seperate skus. In the past I would use plugins with my website to fake this on the front end of the website. However now I am using shopify so I can push my products to many other market places but I can control them all from shopify. All of these market places and shopify require both parent and child skus. So what I need to be able to do is be able to load a list of parent skus and have excel auto generate variotion skus based off a list pf colors or material types. So I need the generator to basically concatenate the abrevation to end of the parent sku and post it in a different column. So example my first parent sku is FD-TEST-001. I have a list of colors which all have a corisponding abbreviations, I need it to run a loop through of all the color options taking the abrevation for the color and concatenating to the parent sku in a diffrent column and then move to the second parent sku and repeat untill the parent sku list is done. I would like to use a macro with a button called generate to excute the command.


PARENT SKUS:
FD-TEST-001
FD-TEST-002

COLORS:
BLACK GLOSS (-BLKG)
BLACK MATTE (-BLKM)

RESULTS:
FD-TEST-001-BLKG
FD-TEST-001-BLKM
FD-TEST-002-BLKG
FD-TEST-002-BLKM


Can somebody help point me in the right direction? I need to do this for size and color options in the future as well as many other minor automations, but I really really just need a way of auto generating skus based off the parent sku and color abbreviation for now that would help so much. I use to have my programmer automate this and many other functions for in the past but its been a year now that he is MIA so I need to find a way to do this my self from excel directly.

-Jason