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 girl with sunglasses looking at her phone'. Remove all words of length '3' in the given sentence.
Example Output: a girl with sunglasses looking at phone

Example Input: Sentence: 'a man walking down a street while talking on a cell phone'. Remove all words of length '3' in the given sentence.
Example Output: a walking down a street while talking on a cell phone

Example Input: Sentence: 'a group of zebras standing in a field and one rolling on its back'. Remove all words of length '1' in the given sentence.
Example Output:
group of zebras standing in field and one rolling on its back