Get the list of screen-names that a user is following?


Hello, I am an academic with programming experience, but no experience with Twitter or web development. I have a simple need to do the following:

For each screen-name X in a list of screen-names (about 250 long):
Obtain the list of screen-names that X is following.

I see that that the followers/id method can get followers, but I need following. Methods to back out following from followers seems impractical given the small size of users who I need the list of following for, and the small size of following lists compared to follower lists.

Also, I am a bit confused about how to use oAuth and how to get started with everything in general.

Can anyone point me to a simple tutorial or solution? Thanks