// Write a function, nicknameGenerator that takes a string name as an argument and returns the first 3 or 4 letters as that name's nickname! If the 3rd letter is a vowel, return the first 4 letters.

// Examples:

// INPUT: nicknameGenerator('Daniel')
// OUTPUT: 'Dan'
// INPUT: nicknameGenerator('Beowulf')
// OUTPUT: 'Beow'


function nicknameGenerator(string) {
  var vowels = ['a', 'e', 'i', 'o', 'u'];
  if (string.length < 4) {
    return string;
  } else {
    if (vowels.includes(string[3])) {
    return string.slice(0,3);
  } else if (vowels.includes(string[4])) {
    return string.slice(0,4);
    }
  }
}

nicknameGenerator('dan')