In this task you are given a sentence. You must judge whether subject of the main clause is singular or plural. Label the instances as "Singular" or "Plural" based on your judgment.

Input: Consider Input: When my tender skin has toughened enough to withstand the pressure of sheets, more visitors arrive.

Output: Plural


Input: Consider Input: The human race needs things inventing constantly in order to evolve.

Output: Singular


Input: Consider Input: The cellar is filling with smoke.


Output: Singular