Find the Missing Trading Card

The full dragon-card collection has a known list of cards, but your binder is missing exactly one! 🃏

You get the full set list and your owned cards (in any order). Print the one card from the full set that isn't in your binder.

Example:

Input: full = ["flame", "frost", "storm", "stone"], owned = ["stone", "flame", "frost"] Output: storm

Checking each full-set card against your binder, "storm" is the only one that never turns up.