How do I perform and OR statement in SharePoint 2013 workflow?

With SharePoint 2013 workflows, how can i specify an "OR" statement? I am trying to get my logic to do something similar, but I can't quite get it...any idea how I can accomplish this? Thanks

IF myField is AA
   OR IF myField is BB
   OR IF myField is CC
   OR IF myField is DD
   OR IF myField is EE
     Perform Action
ElSE IF myField is FF
   OR IF myField is GG
   OR IF myField is HH
     Perform Action
ELSE IF myField is II
   OR IF myField is JJ
     Perform Action