In this task, you need to reverse 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.

Ex Input:
Sentence: 'people watching a music concert being performed on a stage'. Reverse all words of length '5' in the given sentence.

Ex Output:
people watching a cisum concert gnieb performed on a egats


Ex Input:
Sentence: 'two people are holding rackets upright on a tennis court'. Reverse all words of length '7' in the given sentence.

Ex Output:
two people are gnidloh stekcar thgirpu on a tennis court


Ex Input:
Sentence: 'a person with a frisbee standing in the waves'. Reverse all words of length '7' in the given sentence.

Ex Output:

a person with a eebsirf standing in the waves