C1111233133313231133133313331333133311221123121111331333132213211221   >>    C111123313331323113313331333133313331122112312111133133313221321122   <<    C1111233133313231133133313331333133311221123121111331333132213211223   >>      C1111233133313231133133313331333133311221123121111331333132213211222   >>