input: def rotational_substring_check(s1, s2):
      """Provided with two strings. Return True if the second string or any of its rotations appears as a substring within the first string.
      rotational_substring_check("abcd","abd") => False
      rotational_substring_check("hello","ell") => True
      rotational_substring_check("whassup","psus") => False
      rotational_substring_check("abab","baa") => True
      rotational_substring_check("efef","eeff") => False
      rotational_substring_check("himenss","simen") => True
  
      """
output:     # Check if s2 is a substring of s1
      if s2 in s1:
          return True
  
      # Generate and check all rotations of s2
      for i in range(len(s2)):
          rotated = s2[i:] + s2[:i]
          if rotated in s1:
              return True
              
      return False