How to find a file in Amazon S3 bucket without knowing the containing folder

My Amazon S3 bucket has a folder structure that looks like the below.

• bucket-name\00001\file1.txt
• bucket-name\00001\file2.jpg
• bucket-name\00002\file3.doc
• bucket-name\00001\file4.ppt

If I only know file name file3.doc and bucket name bucket-name how can i search for file3.doc in bucket-name. If I knew, it is in folder 00002, I could simply go to the folder and start typing the file name but I have no way to know in which folder the file I am searching for is under.