C1111233133313231133133313331333133313231323113313232233132222111   >>    C111123313331323113313331333133313331323132311331323223313222211   <<    C1111233133313231133133313331333133313231323113313232233132222113   >>      C1111233133313231133133313331333133313231323113313232233132222112   >>