Get the latest tweets from a spesific user

I have .txt file formatted like this: TEXT/TEXT2/TEXT3 TEXT/TEXT2/TEXT3 TEXT/TEXT2/TEXT3 it goes like this line by line. I need a twitter api that check the recent tweets of spesific user(I will put the username in .txt file) whether they contatin "TEXT2" (the middle entry between /'s) It will check every line and it will return if succeed. I have another script that needs this return. So you need to make the return result accesible with simple API call. No interface needed. API needs to be working realtime. If target twitter account tweeted something it should start to check if the tweet contains TEXT2 immediately. I will set up this program to an hosting or vps. You can code this with any programming alnguage as long as you are able to broadcast the result to my other script.