def sortCharset(set):
  _set = ""
  for c in set:
    if c not in _set:
      _set += c
  set = _set
  del _set
  set = list(set)
  set.sort()
  return "".join(set)


def stringForInt(num, set, length):
  setLen = len(set)
  string = ""
  string += set[num % setLen]
  for n in xrange(1,length):
    num //= setLen
    string += set[num % setLen]
  return string


def bruteforce(set, length, raw = False):
  if raw is False:
    set = sortCharset(set)

  for n in xrange(len(set) ** length):
    yield stringForInt(n, set, length)