(Defining Your Own String Methods) Write your own versions of String search methods indexOf and lastIndexOf.   (Creating Three-Letter Strings from a Five-Letter Word) Write an application that reads a...

indexOf and lastIndexOf.

(Creating Three-Letter Strings from a Five-Letter Word)

Write an application that reads a

five-letter word from the user and produces every possible three-letter string that can be derived from the letters of that word. For example, the three-letter words produced from the word “bathe” include “ate,” “bat,” “bet,” “tab,” “hat,” “the” and “tea.”