
    Create a function that extracts the zone identifiers from delivery route codes, where each route code's last character indicates the delivery zone or priority level for fleet management purposes. The function should process a tuple of route codes and return only the final characters that represent the zone classifications.
    

    
def extract_rear(test_tuple):
    """
    Create a function that extracts the zone identifiers from delivery route codes, where each route code's last character indicates the delivery zone or priority level for fleet management purposes. The function should process a tuple of route codes and return only the final characters that represent the zone classifications.
    

    """
def extract_rear(test_tuple):
    """
    Create a function that extracts the zone identifiers from delivery route codes, where each route code's last character indicates the delivery zone or priority level for fleet management purposes. The function should process a tuple of route codes and return only the final characters that represent the zone classifications.
    

    """
    res = list((sub[len(sub) - 1] for sub in test_tuple))
    return res