# lastname.py
# Written by Todd Wareham for CS 2500
"""
Given the name of an employee data file as a command-line argument, extracts and
 prints the last name of each employee stored in the data file. Each line of
 this file describes an employee as three hash mark-separated fields describing
 the employee's ID number, name (lastname, firstnames), and salary.
"""

import sys

if len(sys.argv) != 2:
    print "usage: ", sys.argv[0], " employee-filename"
    sys.exit(1)

for line in open(sys.argv[1]):
    field = line.split("#")
    print (field[1].split(","))[0]