Modify the order to display: post title – thumbnail – excerpt for odd column?

Hi to all I’d like to modify my wordpress template (blog-entries category) to display starting from column4 and only for odd columns: 1) thumbnail 2) post title 3) excerpt. The now schema is title-thumb-excerpt for all columns. For selecting odd column I thought about NTH-CHILD selector but I don’t know ho to write down the php code and where to insert it, any help? Thanks in advance. This is the index.php of my theme (OceanWP):