template = 'http://pleac.sourceforge.net/pleac_perl/%s.html'
chapters = '''strings numbers datesandtimes arrays hashes patternmatching
fileaccess filecontents directories subroutines referencesandrecords
packagesetc classesetc dbaccess userinterfaces processmanagementetc sockets
internetservices cgiprogramming webautomation'''.split()
import urllib, re
for chapter in chapters:
    html = urllib.urlopen(template % chapter).read()
    print re.search(r'AEN(\d+)', html).group(1),
# 14 73 132 170 232 285 359 430 495 536
# 592 642 704 754 792 851 919 978 1007 1054