import java.io._
import java.util.StringTokenizer
import scala.util.control.Breaks.{breakable,break}
import scala.collection.mutable.{Map, Queue, PriorityQueue}

object Main extends App {
  val in = new InputReader(System.in)
  val pw = new PrintWriter(System.out)

  val N, M = in.next().toInt
  val A = new Array[Int](M)
  for (i <- 0 until M)
    A(i) = in.next().toInt

  //
  val map = Map(
    1 -> 2, 2 -> 5, 3 -> 5,
    4 -> 4, 5 -> 5, 6 -> 6,
    7 -> 3, 8 -> 7, 9 -> 6
  )


  val dp = new Array[Int](N+1)
  val init = -1
  for (i <- 0 to N)
    dp(i) = init

  dp(0) = 0
  for (i <- 1 to N) {
    for (e <- A) {
      val diff = i - map(e)
      if (diff >= 0) {
        if (dp(i) == 0)
          dp(i) = dp(diff) + 1
        else
          dp(i) = Math.max(dp(i), dp(diff) + 1)
      }
    }
  }

  var now = N
  var ans = ""
  while (now > 0) {
    breakable {
      for (i <- (1 to 9).reverse) {
        val diff = now - map(i)
        if (A.contains(i) && diff >= 0) {
          if (dp(diff) == dp(now) - 1) {
            now = diff
            ans += i.toString
            break
          }
        }
      }
    }
  }

  println(ans)
}


class InputReader(stream: InputStream) {
  private val reader = new BufferedReader(new InputStreamReader(stream))
  private var tokenizer: StringTokenizer = new StringTokenizer(reader.readLine())
  def next(): String = {
    while (!tokenizer.hasMoreTokens()) {
      tokenizer = new StringTokenizer(reader.readLine())
    }
    tokenizer.nextToken()
  }
}
