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and there are exactly 3 integers. No floats allowed. No characters allowed. Just integers.
そのためのパターンは次のとおりです。\d+\s*,\s*\d+\s*,\s*\d+
\d+\s*,\s*\d+\s*,\s*\d+
任意の数のスペースを含む 3 桁の数字に一致します