class OvrIndexer
    {
        private string[] myData;
        private int arrSize;
        public OvrIndexer(int size)
        {
            arrSize = size;
            myData = new string[size];
            for (int i = 0; i < size; i++)
            {
                myData[i] = "empty";
            }
        }

        public string this[int pos]
        {
            get
            {
                return myData[pos];
            }
            set
            {
                myData[pos] = value;
            }
        }

        public string this[string data]
        {
            get
            {
                int count = 0;
                for (int i = 0; i < arrSize; i++)
                {
                    if (myData[i] == data)
                    {
                        count++;
                    }
                }
                return count.ToString();
            }
            set
            {
                for (int i = 0; i < arrSize; i++)
                {
                    if (myData[i] == data)
                    {
                        myData[i] = value;
                    }
                }
            }
        }