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.

Example Input: Sentence: 'two giraffes standing next to each other next to trees'. Remove all words of length '4' in the given sentence.
Example Output: two giraffes standing to other to trees

Example Input: Sentence: 'a zebra is standing in the green grass'. Remove all words of length '1' in the given sentence.
Example Output: zebra is standing in the green grass

Example Input: Sentence: 'a small elephant walking on a sandy area inside a fence'. Remove all words of length '4' in the given sentence.
Example Output:
a small elephant walking on a sandy inside a fence