import re
s="Juku tuli kooli"
print len(s);
print s.find("k") #kohal 2
print s.find("s") #-1 naitab, et puudub
if s.startswith("Juku"):
  print "Juku lause"

print 5*"tere\n"
aadress="jaagup.kippar@tlu.ee"
avaldis="^([a-z]+\\.)?[a-z0-9]+@[a-z]+\\.[a-z]+$"
if re.match(avaldis, aadress):
  print "korras"
else:
  print "viga"