Agree with Durgamadhab, you should use a query filter like "Matches pattern" (not in list):
Image may be NSFW.
Clik here to view.
Else here a neat trick in order to get use wildcards with Input Controls:
http://blog.davidg.com.au/2012/04/search-field-input-control-in-webi.html
Best regards,
Victor
