Given a string, return true if word "Hi" is repeated 2 times in the string."H" and "i" could be together or separated.
Hint: loop through the string, every time check two characters to see if they are "h" and "i". If they are, then return true, otherwise check the next two characters, and keep doing this until it gets to the end of string. And since you couldn't find anything, you should return false.