C1111233133313231133133313331333133311221123121111121111121111133313223322321   >>    C111123313331323113313331333133313331122112312111112111112111113331322332232   <<    C1111233133313231133133313331333133311221123121111121111121111133313223322323   >>      C1111233133313231133133313331333133311221123121111121111121111133313223322322   >>