C1111233133313231133133313331333131211111331121211113313232233132311111   >>    C111123313331323113313331333133313121111133112121111331323223313231111   <<    C1111233133313231133133313331333131211111331121211113313232233132311113   >>      C1111233133313231133133313331333131211111331121211113313232233132311112   >>