Can someone help me out.

I'm want Airtable to return the "Column name" after he compares 4 adjacent cells in the same row.
I expected to be something like...
if(@A>@B AND(@A>@C) AND(@A>@D), "A")
if(@B>@A AND(@B>@C) AND(@B>@D), "B")
if(@C>@A AND(@C>@B) AND(@C>@D), "C")
if(@D>@A AND(@D>@B) AND(@D>@C), "A")
Thanks in advance!