Fair Share of Candy

After the great candy trade, the playground rule is simple: everyone must end up with the SAME total. 🍬

You get the haul as name:candies events (a name can appear several times — add them up). Print fair if every kid's total is equal, otherwise unfair.

Example:

Input: haul = ["mia:3", "leo:2", "mia:1", "leo:2"] Output: fair

Mia's total is 3 + 1 = 4 and leo's total is 2 + 2 = 4 — equal, so it's fair.