def short_int_name(long_name):
    """
    This function shortens the interface name for easier reading

    :param long_name:  The input string (long interface name)
    :return:  The shortened interface name
    """
    replace_pairs = [
        ('fortygigabitethernet', 'Fo'),
        ('tengigabitethernet', 'Te'),
        ('gigabitethernet', 'Gi'),
        ('fastethernet', 'Fa'),
        ('ethernet', 'Eth'),
        ('port-channel', 'Po'),
        ('loopback', "Lo")
    ]
    lower_str = long_name.lower()
    for pair in replace_pairs:
        if pair[0] in lower_str:
            return lower_str.replace(pair[0], pair[1])
    else:
        return long_name