Regex - Rule Not Processing Properly - Config Start

coaxial

I am trying to create a rule to check the compliance of GigabithEthernet0/0 or FastEthernet0 using the same set of conditions. I have set the config start and end blocks accordingly:

Config Start: interface (GigabitEthernet0/0|FastEthernet0)

Config End: interface GigabitEthernet 0/1

However, the regex interpreter doesn't seem to match FastEthernet0. Am I doing something wrong here?

coaxial

The interpreter seems to match strings like "interface FastEthernet0/0/0" when I don't actually want it to. Any ideas?