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 pitcher releases the ball on the mound'. Remove all words of length '7' in the given sentence.
a releases the ball on the mound

Sentence: 'a bird perched on a wood rail by itself'. Remove all words of length '7' in the given sentence.
a bird on a wood rail by itself

Sentence: 'a man with suit and tie holding an umbrella walking down the street in the rain'. Remove all words of length '6' in the given sentence.

a man with suit and tie holding an umbrella walking down the in the rain