- given a string, find all the vowels in the string. Store them in a new string
- example:
- parameters: "four score and seven years ago"
- return: "ouoeaeeeaao"
- create variable to store vowels
- begin loop
- get each letter, one at a time
- compare it with each each vowel and see if it matches
- if it is, add it to the vowel variable
- repeat