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.

Input: Consider Input: Sentence: 'a small bird is on top of a branch'. Remove all words of length '6' in the given sentence.

Output: a small bird is on top of a


Input: Consider Input: Sentence: 'a old building that has a big clock on top'. Remove all words of length '4' in the given sentence.

Output: a old building has a big clock on top


Input: Consider Input: Sentence: 'a surfer on his surfboard performing a move'. Remove all words of length '6' in the given sentence.


Output: a on his surfboard performing a move