def calc(total, current, list, point)
  if point == list.size
    if total == current
      return ""
    else
      return nil
    end
  end
  # +
  next_current = current + list[point]
  if next_current <= total
    if next_calc = calc(total, next_current, list, point + 1)
      return "+" + next_calc
    end
  end
  # *
  next_current = current * list[point]
  if next_current <= total
    if next_calc = calc(total, next_current, list, point + 1)
      return "*" + next_calc
    end
  end
  return nil
end

n = gets.to_i
total = gets.to_i
list = gets.split.map &:to_i
puts calc(total, list[0], list, 1)