C1111233133313231133133313331333133311221123121111121111123231323111   >>    C111123313331323113313331333133313331122112312111112111112323132311   <<    C1111233133313231133133313331333133311221123121111121111123231323113   >>      C1111233133313231133133313331333133311221123121111121111123231323112   >>