In this task, you need to remove all words of a given length in the sentence. The number of letters in a word determine its length, for example, the length of the word "apple" is 5.

Input: Consider Input: Sentence: 'a black bear sitting on top of a fallen log at a zoo'. Remove all words of length '7' in the given sentence.

Output: a black bear on top of a fallen log at a zoo


Input: Consider Input: Sentence: 'a cow stretching its head over a fence to eat some leaves'. Remove all words of length '4' in the given sentence.

Output: a cow stretching its a fence to eat leaves


Input: Consider Input: Sentence: 'two giraffes are standing next to each other'. Remove all words of length '4' in the given sentence.


Output: two giraffes are standing to other