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: 'the elderly couple is sitting on the park bench looking at the view of interesting buildings'. Remove all words of length '11' in the given sentence.

the elderly couple is sitting on the park bench looking at the view of buildings