bash script to open multiple documents to indicated Compiz Desktop Cube viewports

With the help from LibreOfficeForum, I write a bash script to open multiple .ods documents as follows.

Now,I need more helps to modify the script to open these documents to indicated Compiz Desktop Cube viewports,
such as a.ods in viewport1, b.ods in viewport2, c.ods in viewport3,

Any Idea? thanks a lot.

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#!/bin/bash
libreoffice /media/sda2/a.ods /media/sda2/b.ods /media/sda2/c.ods