C1111233133313231133133313331323133313113313111311331323132212121   >>    C111123313331323113313331333132313331311331311131133132313221212   <<    C1111233133313231133133313331323133313113313111311331323132212123   >>      C1111233133313231133133313331323133313113313111311331323132212122   >>