from re import search

def check_equal(str1, str2):
  for char in range(len(str1)):
    if str1[char] != str2[char]: return False
  return True

def reversed_word(word):
  return ''.join([word[len(word) - 1 - i] for i in range(len(word))])

def check_palindrome(string):
  return string == reversed_word(string)

def contains_string(str1, str2):
  match = search(pattern=str2, string=str1)
  return match.span()[0] if match != None else -1

if __name__ == "__main__":
  print(check_equal('hei', 'hello'))
  print(check_equal('hello', 'hello'))
  print()
  print(reversed_word('star desserts'))
  print()
  print(check_palindrome('agnes i senga'))
  print(check_palindrome('hello'))
  print()
  print(contains_string('pepperkake', 'per'))
  print(contains_string('pepperkake', 'ola'))