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 group of men riding skis down a snow covered slope'. Remove all words of length '6' in the given sentence.
a group of men skis down a snow covered slope

Sentence: 'a boy and girl sitting on top of a skateboard'. Remove all words of length '2' in the given sentence.
a boy and girl sitting top a skateboard

Sentence: 'a woman sitting at a desk next to a woman bending over'. Remove all words of length '7' in the given sentence.

a woman at a desk next to a woman over