In this task, you are given a sentence. You must find the primary subject in the supplied sentence. The output must be a sub-sequence in the sentence.

Input: Consider Input: Ropes are made from vegetable fibres each of which is only between two and four feet long, and the first process is to comb these fibres out in a long, even ribbon, as shown in an exaggerated form in fig. 6-1.

Output: Ropes


Input: Consider Input: This should be secured in the stern-sheets of the first boat.

Output: This


Input: Consider Input: New sisal rope is as strong as a second-grade manila, but it is less flexible, durable and resistant to wear and weather.


Output: New sisal rope