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 photo looking up at a clock in a subway station'. Remove all words of length '5' in the given sentence.
a looking up at a in a subway station

Sentence: 'a man sleeping in bed with a cat lying on him'. Remove all words of length '5' in the given sentence.
a man sleeping in bed with a cat on him

Sentence: 'a couple of zebras eating grass from a small grass area'. Remove all words of length '1' in the given sentence.

couple of zebras eating grass from small grass area