title: Searching mismatched changes between Perforce branches
body: <p>There are four branches in Perforce depot: B1, B2, B3 and B4.<br>
  Let's think B1 as main (core, trunk).<br>
  B2 and B3 could contain changes which <strong>must</strong> be included into B1 but missed by some reasons.<br>
  B4 is target branch which is already created from B1 but because of missed B2 and B3 changes in B1 is not full.<br>
  The goal is to build <strong>list of files</strong> (not make merge!) which were not propagated from B2 and B3 to B1 (one list) and which were not propagated from B1 to B4</p>