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 person is walking down the beach holding a surfboard'. Remove all words of length '3' in the given sentence.

Output: a person is walking down beach holding a surfboard


Input: Consider Input: Sentence: 'a group of people are working on a farm'. Remove all words of length '5' in the given sentence.

Output: a of people are working on a farm


Input: Consider Input: Sentence: 'a dog is sitting behind a row of stuffed cows'. Remove all words of length '7' in the given sentence.


Output: a dog is behind a row of cows