Definition: 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: Sentence: 'man standing in a field with frisbees in his hand and a dog standing on his back'. Remove all words of length '5' in the given sentence.

man standing in a with frisbees in his hand and a dog standing on his back