/* Aa^~ kokoro ga pyompyon suru n jaa^~
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*/

#include <bits/stdc++.h>
using namespace std;

using VI = vector<int>;
using VVI = vector<VI>;
using PII = pair<int, int>;
using LL = long long;
using VL = vector<LL>;
using VVL = vector<VL>;
using PLL = pair<LL, LL>;
using VS = vector<string>;

#define ALL(a)  begin((a)),end((a))
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define MT make_tuple
#define SZ(a) int((a).size())
#define SORT(c) sort(ALL((c)))
#define RSORT(c) sort(RALL((c)))
#define UNIQ(c) (c).erase(unique(ALL((c))), end((c)))

#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)

#define FF first
#define SS second

template<class S, class T>
istream& operator>>(istream& is, pair<S,T>& p){
  return is >> p.FF >> p.SS;
}
template<class T>
istream& operator>>(istream& is, vector<T>& xs){
  for(auto& x: xs)
	is >> x;
  return is;
}
template<class S, class T>
ostream& operator<<(ostream& os, const pair<S,T>& p){
  return os << p.FF << " " << p.SS;
}
template<class T>
ostream& operator<<(ostream& os, const vector<T>& xs){
  for(unsigned int i=0;i<xs.size();++i)
	os << (i?" ":"") << xs[i];
  return os;
}
template<class T>
void maxi(T& x, T y){
  if(x < y) x = y;
}
template<class T>
void mini(T& x, T y){
  if(x > y) x = y;
}
void debug(istringstream&){}
template <char sep=',', class Head, class... Tail>
void debug(istringstream& iss, Head&& head, Tail&&... tail)
{
  string name;
  getline(iss, name, ',');
  cout << sep << name << "=" << head;
  debug(iss, forward<Tail>(tail)...);
}

#ifdef PYONPOI
#define DEBUG(...) \
  do{ \
    istringstream ss(#__VA_ARGS__); \
    debug<' '>(ss, __VA_ARGS__); \
    cout<<endl; \
  }while(0)
#else
#define DEBUG
#endif


const double EPS = 1e-10;
const double PI  = acos(-1.0);
const LL MOD = 1e9+7;

VI ds = {0,2
,
5
,
5
,
4
,
5
,
6
,
3
,
7
,
6
 };

int ok[10][10010];
int memo[10][10010];
int len[10][10010];
void solve(int d, int x, VI& xs){
  if(ok[d][x]){
    return;
  }
  if(x == 0){
    ok[d][x] = 1;
    return;
  }
  if(d == 0){
    ok[d][x] = -1;
    return;
  }
  if(!xs[d]){
    solve(d-1, x, xs);
    if(ok[d-1][x] > 0){
      ok[d][x] = 1;
      len[d][x] = len[d-1][x];
    }
    return;
  }

  ok[d][x] = -1;
  for(int i=0;i<=x/ds[d];++i){
    int xx = x-i*ds[d];
    solve(d-1, xx, xs);
    if(ok[d-1][xx] > 0){
      ok[d][x] = 1;

      int l = len[d-1][xx] + i;
      if(len[d][x] <= l){
        len[d][x] = l;
        memo[d][x] = i;
      }
    }
  }
}

string get(int d, int x, VI& xs){
  if(d == 0 || x == 0) return "";
  if(!xs[d]) return get(d-1, x, xs);

  return string(memo[d][x], '0' + d) + get(d-1, x - ds[d] * memo[d][x], xs);
}

int main(){
  cin.tie(0);
  ios_base::sync_with_stdio(false);

  int N, M;
  cin >> N >> M;
  VI xs(10);
  REP(i,M){
    int x;
    cin >> x;
    xs[x] = 1;
  }

  solve(9, N, xs);
  cout << get(9, N, xs) << endl;

  return 0;
}


Measured memory_bytes: 1280