comefrom: <doocs>0744.Find Smallest Letter Greater Than Target_1.py
code: def nextGreatestLetter( letters: List[str], target: str) -> str:
      left, right = 0, len(letters)
      while left < right:
          mid = (left + right) >> 1
          if ord(letters[mid]) > ord(target):
              right = mid
          else:
              left = mid + 1
      return letters[left % len(letters)]
masked: def sample_funcname ( var_0 : List [ str ] , var_3 : str ) -> str :
      var_5 , var_7 = 0 , len ( var_0 )
      while var_5 < var_7 :
          var_9 = ( var_5 + var_7 ) >> 1
          if ord ( var_0 [ var_9 ] ) > ord ( var_3 ) :
              var_7 = var_9
          else :
              var_5 = var_9 + 1
      return var_0 [ var_5 % len ( var_0 ) ]
  