1. scripts/greet_test.pl / 
       -> Congratulations, Greet is on Catalyst!
    2. scripts/greet_test.pl /greeting/say/hello/world
       -> hello, world
    3. scripts/greet_test.pl /greeting/hello/world
       -> greeting, hello, world
    4. scripts/greet_test.pl /hi/there/greeting/say/hello/world
       -> hi, there, greeting, say, hello, world