basic I before E rule. If 'E' is before 'I' it's an 'A' sound. Neighbor, Vein, Sleigh, Weigh, etc...
Write I before E
Except after C
Or when it sounds like an A
As in "neighbor" and "weigh"
exceptions to the rule: seize, either, weird, height, foreign, leisure, conscience, counterfeit, forfeit, leisure, neither, science, species, sufficient