Need an Advance Sorting code/VBA.

Hi Guys,
My data has about 500 rows from Column I to R (total 10 columns).
The data in row N & O are duplicated.. And row O data can be Self-Duplicated
Now I need to sort:

1. If data in Column N = Column O (Duplicate), Move all data from "Columns I J K L M N" to that row.
2. If data in Column O is Self-Duplicated. Then copy & Move all data from "Columns I J K L M N" to that row.
3. If data in Column O is empty or contains something that doesn't exist on Column N. Then all data from "Columns I J K L M N" should be empty.

Results should be like this:

Honestly speaking, I've spent this whole weekend for this but I'm getting no where as I don't have much VBA background and My head has been hurting trying to solve this.
So, I'm wondering If someone here is kind enough to write an example coding/VBA for this.

Thanks guys,