C1111233133313231133133313231333133313113313113313331331121111332213121   >>    C111123313331323113313331323133313331311331311331333133112111133221312   <<    C1111233133313231133133313231333133313113313113313331331121111332213123   >>      C1111233133313231133133313231333133313113313113313331331121111332213122   >>