It looks like the method I chose doesn't work with multiple rows. The formula works, but only with a single row for some reason.
Someone will come up with a solution for you. Here's a simpler version btw, some of the previous formula was superfluous:
=if( iserror( match(b16,f16:j16,0) ) ,"",b16)
Edit: Jason, why is it necessary to work with the rows one at a time?