
    Write a function that simplifies patient identification codes in a medical record system by removing alternate characters that represent non-essential separators, specifically targeting characters at odd-indexed positions. The resulting streamlined code should retain only the essential identifying characters positioned at even indices, making it more efficient for database storage and retrieval.
    

    
def odd_values_string(str):
    """
    Write a function that simplifies patient identification codes in a medical record system by removing alternate characters that represent non-essential separators, specifically targeting characters at odd-indexed positions. The resulting streamlined code should retain only the essential identifying characters positioned at even indices, making it more efficient for database storage and retrieval.
    

    """
def odd_values_string(str):
    """
    Write a function that simplifies patient identification codes in a medical record system by removing alternate characters that represent non-essential separators, specifically targeting characters at odd-indexed positions. The resulting streamlined code should retain only the essential identifying characters positioned at even indices, making it more efficient for database storage and retrieval.
    

    """
    result = ''
    for i in range(len(str)):
        if i % 2 == 0:
            result = result + str[i]
    return result