I ran the numbers just by using any search engine (Yahoo, DuckDuckGo, Google) and came up with C7ZZ-6521547-A being a door run
https://www.npdlink.com/product/runs-front-door-glass-pair/103779For belt line there are either 4 or 8 different part numbers depending on body type.
Maybe you wrote down the number incorrectly for the second number as C7ZZ-6521546-A would be the door/window run for the other side if you have a pair of these
Each of them is inserted into the window run (front door) where the forward window edge slides up and down in
Posting pictures would likely be easier