
    Create a function for the hospital's EHR system that processes medical device serial numbers by removing alternate characters to comply with the standardized formatting protocol. The function should take a device serial number as input and return a new string containing only the characters at even indices (0, 2, 4, etc.), ensuring compatibility with the hospital's data management system.
    

    
def odd_values_string(str):
    """
    Create a function for the hospital's EHR system that processes medical device serial numbers by removing alternate characters to comply with the standardized formatting protocol. The function should take a device serial number as input and return a new string containing only the characters at even indices (0, 2, 4, etc.), ensuring compatibility with the hospital's data management system.
    

    """
def odd_values_string(str):
    """
    Create a function for the hospital's EHR system that processes medical device serial numbers by removing alternate characters to comply with the standardized formatting protocol. The function should take a device serial number as input and return a new string containing only the characters at even indices (0, 2, 4, etc.), ensuring compatibility with the hospital's data management system.
    

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