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.

Q: Sentence: 'a gray teddy bear sitting behind an alarm clock'. Remove all words of length '6' in the given sentence.

A: a gray teddy bear sitting an alarm clock
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Q: Sentence: 'a black and white picture of a train on the tracks'. Remove all words of length '6' in the given sentence.

A: a black and white picture of a train on the
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Q: Sentence: 'a person is riding on top of a skateboard'. Remove all words of length '1' in the given sentence.

A:
person is riding on top of skateboard
****