C1111233133313231133133313231333133313113313113313331313311212121   >>    C111123313331323113313331323133313331311331311331333131331121212   <<    C1111233133313231133133313231333133313113313113313331313311212123   >>      C1111233133313231133133313231333133313113313113313331313311212122   >>