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 green door in an alley way with an arch'. Remove all words of length '3' in the given sentence.
a green door in an alley with an arch

Sentence: 'a black suitcase with a cat peeking outside of it'. Remove all words of length '4' in the given sentence.
a black suitcase a cat peeking outside of it

Sentence: 'a girl is snowboarding down a hill by a forest'. Remove all words of length '12' in the given sentence.

a girl is down a hill by a forest