PlayStore

Sample input-output

You have successfully bought item r1
You have successfully bought item r3
You have successfully bought item r3
Balance is not sufficent. You need at least 100$ in your account.
You have successfully bought item r3
Congradulations you are a premium member in PlayStore!
The operating systems version is less than the minimum required version number of the game
The operating systems are not the same
You have successfully bought item g1
Games
g1 - Pokemon
g2 - Pokemon
g3 - MineCraft
Book
r1 - War and Peace
r2 - The great gatsby
r3 - Introduction to algorithms
Magazine
r3 - Forbes
Genre found r1 - Novel
John Doe ( u1 ) : This is a fantastic game!
	Jane Doe ( u2 ) : I never liked this game!
		John Doe ( u1 ) : Why not??
Dave Roe ( u3 ) : The game crashes frequently