
    Design a function to simplify patient tracking codes in the emergency room by removing alternate characters from the original medical record numbers, creating a shortened reference format that maintains uniqueness. The function should process each patient identification string by retaining only the even-indexed characters, enabling faster visual scanning and reference by medical staff during high-volume periods. The resulting simplified codes must preserve the essential identifying information while reducing cognitive load on healthcare workers.
    

    
def odd_values_string(str):
    """
    Design a function to simplify patient tracking codes in the emergency room by removing alternate characters from the original medical record numbers, creating a shortened reference format that maintains uniqueness. The function should process each patient identification string by retaining only the even-indexed characters, enabling faster visual scanning and reference by medical staff during high-volume periods. The resulting simplified codes must preserve the essential identifying information while reducing cognitive load on healthcare workers.
    

    """
def odd_values_string(str):
    """
    Design a function to simplify patient tracking codes in the emergency room by removing alternate characters from the original medical record numbers, creating a shortened reference format that maintains uniqueness. The function should process each patient identification string by retaining only the even-indexed characters, enabling faster visual scanning and reference by medical staff during high-volume periods. The resulting simplified codes must preserve the essential identifying information while reducing cognitive load on healthcare workers.
    

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