पूजा सुपरफास्ट - हर रोज़ चलूँ मैं तेरे साथ मंज़िल मंज़िल - by Shubham Yadav

In coach numbering
S stands for sleeper
A = AC 2 tier
B = AC 3 tier
C = Chair Car
D...
more...

= Second Class Sitting (2S)
E = Executive Chair Car (Shatabdi)
F = First Class
G = Garib Rath 3rd AC sleeper
H = AC First Class/Executive Chair Car in some intercities
J = Chair Car (Garib Rath)
S = Second Class Sleeper
A to H all alphabets are contagious, but I is left and then Garib Rath Chair Car is given code J. Then for which class I stands for?