Design a class called "sentence" that have a constructor that takes a string representing the sentence as input. The class should have the following methods:
replace(index, new_word) Change a word at a particular index to "new_word." E.g. If the sentence is " I'm going back." and set_word_at_index (2, "home"), then the sentence becomes "I'm going home."
someone explain to me I am little confused about the input.