//#include <atcoder/all>
#include <bits/stdc++.h>
#include <cmath>
using namespace std;
//using namespace atcoder;
using ll = long long;
#define all(A) A.begin(),A.end()
using vll = vector<ll>;
#define rep(i, n) for (long long i = 0; i < (long long)(n); i++)
using Graph = vector<vector<ll>>;
vector<ll> fact, factinv, inv;

ll gcd(ll(a), ll(b)) {
	ll c = a;
	while (a % b != 0) {
		c = a % b;
		a = b;
		b = c;
	}
	return b;
}
ll mod = 1e9 + 7;
void prenCkModp(ll n) {
	fact.resize(n + 5);
	factinv.resize(n + 5);
	inv.resize(n + 5);
	fact.at(0) = fact.at(1) = 1;
	factinv.at(0) = factinv.at(1) = 1;
	inv.at(1) = 1;
	for (ll i = 2; i < n + 5; i++) {
		fact.at(i) = (fact.at(i - 1) * i) % mod;
		inv.at(i) = mod - (inv.at(mod % i) * (mod / i)) % mod;
		factinv.at(i) = (factinv.at(i - 1) * inv.at(i)) % mod;
	}

}
ll nCk(ll n, ll k) {
	if (n < k) return 0;
	return fact.at(n) * (factinv.at(k) * factinv.at(n - k) % mod) % mod;
}
int main() {
	ll N;
	cin>>N;
	//prenCkModp(N);
	vll C(9);
	ll S=0;
	rep(i,9){
		cin>>C[i];
		S+=C[i]*(i+1);
	}
	ll G=-1;
	rep(i,9){
		rep(j,9){
			if(C[i]*C[j]>0){
				if((i-j)%3!=0){
					if(G==-1)G=abs(i-j);
					G=gcd(G,abs(i-j));
				}
				
			}
		}
	}
	if(G==-1){
		rep(i,9){
			if(C[i]!=0){
				rep(j,C[i]){
					cout<<i+1;
				}
				cout<<endl;
				return 0;
			}
		}
	}
	if(S%9==0){
		cout<<G*9<<endl;
	}
	else if(S%3==0){
		cout<<G*3<<endl;

	}
	else cout<<G<<endl;
	

}