C11111333133313232233133313331333133313331312111133133311233112121   >>    C1111133313331323223313331333133313331333131211113313331123311212   <<    C11111333133313232233133313331333133313331312111133133311233112123   >>      C11111333133313232233133313331333133313331312111133133311233112122   >>