[pcre-dev] PCRE Question

Hello:

I have a phone software that runs pcre. In this software i am trying to
create a rule that allows me to send a automated text to people who text me
"hey" or "hi" AND have 8 alphanumeric characters or less. When I set up a
rule for just the hey and the 8 alphanumeric I put
+"Hey"-<\w{8}>

and it worked. but when I tried the hey or hi, it wouldn't work. Any
suggestions?