
    Write a function that extracts the zone designation (last character) from each delivery route identifier in a given collection of route codes, which is essential for organizing fleet assignments by geographical sectors. The extracted zone designations will be used to optimize delivery paths and allocate vehicles efficiently across different delivery zones.
    

    
def extract_rear(test_tuple):
    """
    Write a function that extracts the zone designation (last character) from each delivery route identifier in a given collection of route codes, which is essential for organizing fleet assignments by geographical sectors. The extracted zone designations will be used to optimize delivery paths and allocate vehicles efficiently across different delivery zones.
    

    """
def extract_rear(test_tuple):
    """
    Write a function that extracts the zone designation (last character) from each delivery route identifier in a given collection of route codes, which is essential for organizing fleet assignments by geographical sectors. The extracted zone designations will be used to optimize delivery paths and allocate vehicles efficiently across different delivery zones.
    

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