C11111211113313112113313331333133313133313232233133313123313131   >>    C1111121111331311211331333133313331313331323223313331312331313   <<    C11111211113313112113313331333133313133313232233133313123313133   >>      C11111211113313112113313331333133313133313232233133313123313132   >>