C11111211113313112113313331333133313133313232233133311233112323331   >>    C1111121111331311211331333133313331313331323223313331123311232333   <<    C11111211113313112113313331333133313133313232233133311233112323333   >>      C11111211113313112113313331333133313133313232233133311233112323332   >>