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: 'two small children ski down a snowy tree lined slope'. Remove all words of length '4' in the given sentence.
two small children ski a snowy lined slope

Sentence: 'a man is in a grassy field with animals'. Remove all words of length '7' in the given sentence.
a man is in a grassy field with

Sentence: 'a girl running to hit a tennis ball with her racquet'. Remove all words of length '4' in the given sentence.

a running to hit a tennis her racquet