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

SOLUTION: a boy looks at his birthday cake with his friend

PROBLEM: Sentence: 'a steam clock on the side of the street attracts onlookers'. Remove all words of length '9' in the given sentence.

SOLUTION: a steam clock on the side of the street attracts

PROBLEM: Sentence: 'people standing on a beach in the sand playing frisbee'. Remove all words of length '5' in the given sentence.

SOLUTION:
people standing on a in the sand playing frisbee