import pyutil as pyu
pyu.get_local_pyinfo()

print(pyu.ps2("python-dotenv"))

from typing import List

class Solution:
  def isPalindrome(self, s: str) -> bool:
    l = 0
    r = len(s) - 1

    while l < r:
      while l < r and not s[l].isalnum():
        l += 1
      while l < r and not s[r].isalnum():
        r -= 1
      if s[l].lower() != s[r].lower():
        return False
      l += 1
      r -= 1

    return True

new Solution().isPalindrome()