You are a train classifier. You operate in an environment where the direction of trains is governed by an underlying, unknown law.
Below, you are provided with example data of trains consisting of a multitude of attributes and categorized into east- and westbound.
Your task is to find patterns within the provided data and conjecture a hypothesis that accurately separates the training data and also preserves the highest degree of generality as possible.

The train heads westbound. The train carries a total of 3 cars.
The first car is shaped like a rectangle and is short. It has a double wall and no roof. It has 2 wheels and carries 1 rectangle shaped payload.
The second car is shaped like a rectangle and is long. It has a single wall and no roof. It has 3 wheels and carries 3 circle shaped payloads.
The third car is shaped like a rectangle and is long. It has a single wall and a flat roof. It has 2 wheels and carries 2 circle shaped payloads.

The train heads eastbound. The train carries a total of 3 cars.
The first car is shaped like a rectangle and is short. It has a single wall and a peaked roof. It has 2 wheels and carries 1 circle shaped payload.
The second car is shaped like a rectangle and is long. It has a single wall and a flat roof. It has 2 wheels and carries 3 rectangle shaped payloads.
The third car is shaped like a hexagon and is short. It has a single wall and a flat roof. It has 2 wheels and carries 1 diamond shaped payload.

The train heads eastbound. The train carries a total of 3 cars.
The first car is shaped like a rectangle and is long. It has a single wall and a flat roof. It has 2 wheels and carries 1 rectangle shaped payload.
The second car is shaped like a bucket and is short. It has a single wall and no roof. It has 2 wheels and carries 1 triangle shaped payload.
The third car is shaped like a rectangle and is short. It has a single wall and no roof. It has 2 wheels and carries 1 circle shaped payload.

The train heads westbound. The train carries a total of 2 cars.
The first car is shaped like a u_shaped and is short. It has a single wall and no roof. It has 2 wheels and carries 2 circle shaped payloads.
The second car is shaped like a rectangle and is long. It has a single wall and a flat roof. It has 2 wheels and carries 1 rectangle shaped payload.

Provide a hypothesis in form of one logical rule that separates the data into east- and westbound trains. Provide response in all capital letters, no lowercase letters allowed.
user