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 group of people on horses in a field'. Remove all words of length '2' in the given sentence.
Example Output: a group people horses a field

Example Input: Sentence: 'a couple of people sitting and standing next to a white bath tub'. Remove all words of length '3' in the given sentence.
Example Output: a couple of people sitting standing next to a white bath

Example Input: Sentence: 'a group of people standing on a hill tossing a boomarang'. Remove all words of length '9' in the given sentence.
Example Output:
a group of people standing on a hill tossing a