may be composition nahin bann paya hoga 3 rake ka.. as kuch coaches spare me rakha jata hai, aur ek scene shayad staff ka bhi ho sakta hai LHB Cocahes different mechanism pe kaam karte hain uski training bhi di gayi thi BGP ke staffs ko.. so rake ke sath jane wale staff agar fully trained nahin honge to mushkil hogi so complete trained staff ko hi bheja jayega.. fir ek aur scene ye hai ki ER ne Poorva ko bhi ek ek rake kar ke hi LHB kiya tha.. sooner or later teeno rake LHB ho jayega .. is baat ke liye Cheers ki finally LHB to hui