If the city is closer to, or on, the Tyrrhenian/Ligurian Sea (in general the west coast), type 'W', and if the city is closer to, or on, the Adriatic/Ionian Sea, (generally the east coast), type 'E'.
In order to create a playlist on Sporcle, you need to verify the email address you used during registration. Go to your Sporcle Settings to finish the process.