345. Reverse Vowels of a String

class Solution:
  def reverseVowels(self, s: str) -> str:
    l = 0
    r = len(s) - 1
    vowel = ['a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U']
     
    while l < r:
      if s[l] in vowel and s[r] in vowel:
        s = s[:l] + s[r] + s[l + 1:r] + s[l] + s[r + 1:]
        l += 1
        r -= 1
      elif s[l] in vowel and s[r] not in vowel:
        r -= 1
      elif s[l] not in vowel and s[r] in vowel:
        l += 1
      else:
        l += 1
        r -= 1
    
    return s