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 man with a backpack waiting at a train station'. Remove all words of length '7' in the given sentence.
a man with a backpack at a train

Sentence: 'a street with several vendor stalls and people walking around'. Remove all words of length '1' in the given sentence.
street with several vendor stalls and people walking around

Sentence: 'a clock on a street post with a name above it'. Remove all words of length '6' in the given sentence.

a clock on a post with a name above it