C111123313331323113313331333133313231333132311312111133133313113311221123121   >>    C11112331333132311331333133313331323133313231131211113313331311331122112312   <<    C111123313331323113313331333133313231333132311312111133133313113311221123123   >>      C111123313331323113313331333133313231333132311312111133133313113311221123122   >>