C1111233131211111211113313331333133313221211113313331333133313232233133313331   >>    C111123313121111121111331333133313331322121111331333133313331323223313331333   <<    C1111233131211111211113313331333133313221211113313331333133313232233133313333   >>      C1111233131211111211113313331333133313221211113313331333133313232233133313332   >>