
    Given a collection of delivery route codes, create a function that extracts the zone identifiers (last character) from each route code to help fleet managers quickly assign vehicles during peak traffic hours. The function should process a tuple of route codes and return only the terminal zone identifiers that determine optimal last-mile delivery assignments.
    

    
def extract_rear(test_tuple):
    """
    Given a collection of delivery route codes, create a function that extracts the zone identifiers (last character) from each route code to help fleet managers quickly assign vehicles during peak traffic hours. The function should process a tuple of route codes and return only the terminal zone identifiers that determine optimal last-mile delivery assignments.
    

    """
def extract_rear(test_tuple):
    """
    Given a collection of delivery route codes, create a function that extracts the zone identifiers (last character) from each route code to help fleet managers quickly assign vehicles during peak traffic hours. The function should process a tuple of route codes and return only the terminal zone identifiers that determine optimal last-mile delivery assignments.
    

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