Need someone to find best long tail keywords for 2500 picture files and rename them

I have over 2500 picture files that are based on different themes like flower, peacock etc. I want someone who can rename them with long-tail keywords like if the flower is rose the file name should be red-rose-beautiful etc. and not just flower.jpg. I want a variety of names, based on the content of the picture. Its very easy job.

Please bid for 2500 files