C1111233133313231133133313331333133313231312111133132313111323331333132212121   >>    C111123313331323113313331333133313331323131211113313231311132333133313221212   <<    C1111233133313231133133313331333133313231312111133132313111323331333132212123   >>      C1111233133313231133133313331333133313231312111133132313111323331333132212122   >>