Genome assembly

I have downloaded 30 complete genome assemblies of a bacteria.
I want to perform a 16s Rna genetic analysis..
I can extract the sequence manually...however...I came across contest16s...
Now my...question is..can I extract the 16s sequence of all 30 genomes together at a single go by using contest16s..
Or can you suggest any other web based software for doing the same..
Thanks and Regards...