Case In Fact

  Intro:                                               
E|--------------------------------------|                 
B|---1-3-1-------0----------1-----------|                 
G|---------0-2-2---2-0-0--0---0--0---0--|                 
D|----------------------3---------------| <-3 is optional 
A|-3---------0-0------------------------|                 
E|--------------------------------------|                 

  After Intro:
E|------------| 
B|------------| 
G|------------| 
D|-1-1-0---0--| 
A|-------3----| 
E|------------|