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 green city bus driving thru a parking area'. Remove all words of length '4' in the given sentence.

Output: a green bus driving a parking


Input: Consider Input: Sentence: 'an elephant walking across a dirt road in front of cars'. Remove all words of length '7' in the given sentence.


Output: an elephant across a dirt road in front of cars