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.

Sentence: 'four men are sitting on a bench in an old photo'. Remove all words of length '1' in the given sentence.
four men are sitting on bench in an old photo

Sentence: 'a bus is stopped while three people are crossing'. Remove all words of length '1' in the given sentence.
bus is stopped while three people are crossing

Sentence: 'a bird eating on a fallen apple'. Remove all words of length '1' in the given sentence.

bird eating on fallen apple