Since the process returns input unchanged if there's no match, you can use the thing.ReferenceEquals system to determine whether the strategy has manufactured any replacements to the enter string.?�が?�詞?�し?�使?�れ?�場?�、物?�人?�元?�の位置?�状?�か?�新?�い?�の?�交?�さ?�る?�と?�示?��