Given a String str, convert it into Pig Latin. Let's use these rules:

1. If a word starts with a consonant and then a vowel, put the first letter of the word at the end of the word and add "ay."
Example: Happy = appyh + ay = appyhay

2. If a word starts with two consonants, move the two consonants to the end of the word and add "ay."
Example: Child = Ildch + ay = Ildchay

3. If a word starts with a vowel, add the word "way" at the end of the word.
Example: Awesome = Awesome + way = Awesomeway

4. If a word is only one letter, then just add "way" to the end.
Example: i = i + way = iway