C1111233133313231133133313331333131211111331121211113313232221123231322321   >>    C111123313331323113313331333133313121111133112121111331323222112323132232   <<    C1111233133313231133133313331333131211111331121211113313232221123231322323   >>      C1111233133313231133133313331333131211111331121211113313232221123231322322   >>