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

Example Input: Sentence: 'a cat who is curled up and sitting on a wooden bench'. Remove all words of length '1' in the given sentence.
Example Output:
cat who is curled up and sitting on wooden bench