Thread Subject: fuzzy logic toolbox

Hi people. I am currently designing a Handover algorithm based on
fuzzy logic, and I am doing with the fuzzy logic toolbox.
When I fix the rules I need to combine the AND and OR operator in the
same rule. But form the graphic interface I don´t find the way to
combine them.
I give and exaple.
I have these 3 imput (a b c) and I want to edit a rule in this way:
if a OR b AND c then output.
Can anybody tell me the way?
Thanks and regards,
Alicia