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 boy looks excitedly at his birthday cake with his friend'. Remove all words of length '9' in the given sentence.
a boy looks at his birthday cake with his friend

Sentence: 'two men taking something from an oven in the kitchen'. Remove all words of length '2' in the given sentence.
two men taking something from oven the kitchen

Sentence: 'a large bed sitting underneath a window under three paintings'. Remove all words of length '7' in the given sentence.

a large bed underneath a window under three paintings