Payoff to the long position = $P_T = \max(0, X - S_T)$
= \max(0, \`30 - \$33`) = 0$

Payoff the short position, payoff = $-P_T = -0 = 0$
Profit to the short position = $P_0 - P_T$

where $P_0$ is the option premium

Profit = \`0.50 - 0 = \$0.50`$

Detailed Response

In option contracts, there are always two parties:
(I) the buyer, who takes the long position, and
(II) the seller (writer) who takes the short position

It follows that the seller (short position) of a put option is the trader that promises to buy the underlying stocks at the expiry of the contract. The buyer (long position) is the party that has a right but not the obligation to sell the stocks at expiry. The buyer is also called the holder.

Holder:
At expiration, the holder will only benefit if the prevailing market price is less than the exercise/strike price. The payoff is equal to $P_t = X - S_T$, i.e., strike price minus the market price. If the stock stays at $X$ or above, the payoff will be zero.