monton = 12
llevar = 0

while monton > 0
   print "There are "; monton; " tokens remaining. How many would you like to take? ";
   input integer llevar
   while llevar = 0 or llevar > 3
      print "You must take 1, 2, or 3 tokens. How many would you like to take ";
      input integer llevar
   end while

   print "On my turn I will take "; 4 - llevar; " token(s)."
   monton = monton - 4
end while

print
print "I got the last token. I win! Better luck next time."
end