title: separate Last Name, First Name and Middle Initial in three different columns
body: <p>I have a file which contains Last Name, First Name MI for about 5000 people. 
  I need to split them in 3 different columns. 
  The issue I am facing is , that sometimes there are more than 1 first names, for example I have a person as Davis, Mary Ann L.
  I want Davis in one column.
  Mary Ann in another column and L in the 3rd column. Basically check if after the comma the number of characters is greater than 1. If it is greater than 1 then consider it as first name. If number of characters is equal to 1, then consider it Middle Initial.</p>
  
  <p>How can I achieve this?</p>