Indian Railways Seats Availablity and Reservation
            
            
                Following are various types of seats which can be reserved in Indian Railways trains.
            
            2S - Second Sitting
            These seats are non-air conditioned. Generally day running trains have this class of reservation.
            SL - Sleeper Class
            
                This class is the most popular in Indian Railays. Most of the express train have SL class. This is non-air conditioned class.
                 From 9pm to 6am you can sleep on the berth. 
                 During the day lower berths are used for sitting.
            
            CC - Chair Car
            
                3+2 arragement. AC Coach.
            
            EC - Executive chair car
            First AC Chair car or Executive Chair car . 2+2 arrangement, more spacious designed especially for business class
            EA - Anubhuthi chair car
            The Anubhuti coaches are attached in Shatabdi trains as additional executive class and have ergonomically designed seats.
            3A - AC three tier
            3 beds - Upper , Middle and Lower Beds. AC coach.
            2A - AC two tier
            2 beds - Upper and Lower beds. AC coach. These seats have higher head room as compared to 3AC seats.
            1A - AC first class
            Most expensive AC seats, lockable cabin of 2 beds and 4 beds configuration are available for booking. Seat numbers are only alloted after charting.
            UR/GEN	- Unreserved/General