C1111233133313231133133313331333132313331323132233132313112121121   >>    C111123313331323113313331333133313231333132313223313231311212112   <<    C1111233133313231133133313331333132313331323132233132313112121123   >>      C1111233133313231133133313331333132313331323132233132313112121122   >>