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: 'a wood bench is sitting near a pole'. Remove all words of length '7' in the given sentence.
Example Output: a wood bench is near a pole

Example Input: Sentence: 'a horse pulls a cart next to a bridge'. Remove all words of length '1' in the given sentence.
Example Output:
horse pulls cart next to bridge