C11111211113313112113313331333133313133313232233133313113313232333133311211311   >>    C1111121111331311211331333133313331313331323223313331311331323233313331121131   <<    C11111211113313112113313331333133313133313232233133313113313232333133311211313   >>      C11111211113313112113313331333133313133313232233133313113313232333133311211312   >>