title: Find values from one excel sheet in another
body: <p>I have a column with the values in A excel sheet  1 1 1 2 2 2 3 3 3 4 4 4.... and i have in B excel sheet another column with values 1 2 4 ...., what i want is read values from B and see if they are in A sheet, for example if value 2 is in B sheet, then write true in a new column in sheet A in front of 2, and similarly false or nothing in front of value 3.</p>
  
  <p>thanks </p>