
    Write a function that simplifies emergency room patient identification codes by removing alternate characters, making them easier for medical staff to process during peak hours. The function should take a complete patient ID code as input and return a shortened version containing only characters at even-indexed positions, maintaining the code's essential identifying properties while reducing its complexity.
    

    
def odd_values_string(str):
    """
    Write a function that simplifies emergency room patient identification codes by removing alternate characters, making them easier for medical staff to process during peak hours. The function should take a complete patient ID code as input and return a shortened version containing only characters at even-indexed positions, maintaining the code's essential identifying properties while reducing its complexity.
    

    """
def odd_values_string(str):
    """
    Write a function that simplifies emergency room patient identification codes by removing alternate characters, making them easier for medical staff to process during peak hours. The function should take a complete patient ID code as input and return a shortened version containing only characters at even-indexed positions, maintaining the code's essential identifying properties while reducing its complexity.
    

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