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 repairing a small white airplane outdoors'. Remove all words of length '2' in the given sentence.
Example Output: a man repairing a small white airplane outdoors

Example Input: Sentence: 'a man stands wearing a suit and looking serious'. Remove all words of length '6' in the given sentence.
Example Output: a man wearing a suit and looking serious

Example Input: Sentence: 'two men are paying for their pastries at a counter'. Remove all words of length '5' in the given sentence.
Example Output:
two men are paying for pastries at a counter