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 old building that has a big clock on top'. Remove all words of length '4' in the given sentence.
[A]: a old building has a big clock on top


[Q]: Sentence: 'a man is falling off of his skateboard after trying to skate on an incline with a plywood ramp'. Remove all words of length '6' in the given sentence.
[A]: a man is falling off of his skateboard after to skate on an incline with a plywood ramp


[Q]: Sentence: 'a small bird is on top of a branch'. Remove all words of length '6' in the given sentence.
[A]:
a small bird is on top of a