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.

Sentence: 'a large flock of birds flying over a field next to a  tree'. Remove all words of length '2' in the given sentence.
a large flock birds flying over a field next a tree

Sentence: 'a group of people skiing down the side of a snow covered slope'. Remove all words of length '7' in the given sentence.
a group of people skiing down the side of a snow slope

Sentence: 'a woman crossing a street at a crosswalk while holding an umbrella'. Remove all words of length '2' in the given sentence.

a woman crossing a street a crosswalk while holding umbrella

