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 dog laying in the grass chewing a stick'. Remove all words of length '6' in the given sentence.
a dog in the grass chewing a stick

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 toilet training aid for cat inserted into a toilet next to rolls of toilet papers and a trash bin'. Remove all words of length '1' in the given sentence.

toilet training aid for cat inserted into toilet next to rolls of toilet papers and trash bin