private string getFixedColor(string color) {
        char[] arr = color.ToCharArray ();
        bool flag = true;

        for (int i = 0; i < arr.Length; i++) {
            Debug.Log (arr [i]);
            if (arr [i] != arr [0])
                flag = false;
        }

        if (flag) {
            string res = color.ToCharArray()[0].ToString();
            return res;
        } else
            return new string (arr);
    }