code: def checkInclusion(self, s1: str, s2: str) -> bool:
      window = len(s1)
      s1_c = Counter(s1)
  
      for i in range(len(s2) - window + 1):
          s2_c = Counter(s2[i : i + window])
          if s2_c == s1_c:
              return True
  
      return False
  
label_desc: Use image node_id 1 for calling the Solution obj's underlying member method code with example usage: obj.checkInclusion(s1, s2) and returns: False, True