C1111233131211111211113313331333133313133313231322133313231322322121   >>    C111123313121111121111331333133313331313331323132213331323132232212   <<    C1111233131211111211113313331333133313133313231322133313231322322123   >>      C1111233131211111211113313331333133313133313231322133313231322322122   >>