C11111211113313112113313331333133313133313232233133313123313111   >>    C1111121111331311211331333133313331313331323223313331312331311   <<    C11111211113313112113313331333133313133313232233133313123313113   >>      C11111211113313112113313331333133313133313232233133313123313112   >>