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.

Example Input: Sentence: 'a man is crouched down by a big elephant'. Remove all words of length '3' in the given sentence.
Example Output: a is crouched down by a elephant

Example Input: Sentence: 'purple and blue flowers in a small basket'. Remove all words of length '4' in the given sentence.
Example Output: purple and flowers in a small basket

Example Input: Sentence: 'there is a sandwich french fries and pickle sitting on a plate'. Remove all words of length '1' in the given sentence.
Example Output:
there is sandwich french fries and pickle sitting on plate