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 shirtless man tossing a frisbee under his leg'. Remove all words of length '5' in the given sentence.
a shirtless man tossing a frisbee his leg

Sentence: 'a number of benches at the beach and a boat in the sea'. Remove all words of length '7' in the given sentence.
a number of at the beach and a boat in the sea

Sentence: 'a man talking on a cell phone with his mouth agape'. Remove all words of length '7' in the given sentence.

a man on a cell phone with his mouth agape