#include <bits/stdc++.h>

using namespace std;
ifstream f("prod.in");
ofstream g("prod.out");
int cif[10], s;
int n1[2005], n2[2005], rez[2005];

void Read()
{
  for(int i = 1;i <= 9;++i)
    f>>cif[i];
}

bool compare()
{
  for(int i = 1;i <= n1[0];++i)
    if(n1[i] < n2[i])
      return true;
    else if(n2[i] < n1[i])
      return false;
  return true;
}

void numbers()
{
  int c = 9;
  while(true)
  {
    if(!cif[c])
    {
      --c;
      if(c == 0)
      {
        reverse(n1 + 1, n1 + n1[0] + 1);
        reverse(n2 + 1, n2 + n2[0] + 1);      
        return;
      }
      continue;
    }
    if(compare())
      n1[++n1[0]] = c;
    else
      n2[++n2[0]] = c;
    --cif[c];
  }
  
}

void multiply()
{
  int t = 0;
  rez[0] = n1[0] + n2[0] - 1;
  for(int i = 1;i <= n1[0];++i)
    for(int j = 1;j <= n2[0];++j)
      {
        rez[i + j - 1] += n1[i] * n2[j] + t;
        t = rez[i + j - 1] / 10;
        rez[i + j - 1] %= 10;
      }
   if(t)
    rez[++rez[0]] = t;
}

void Solve()
{
  numbers(); 
  multiply();
  for(int i = rez[0];i >= 1;--i)
    g<<rez[i];
}

int main()
{
  Read();
  Solve();
  return 0;
}