#include <cstdio>
#include <cstring>
#include <string>
#define MAXN 6000
#define BASE 10
using namespace std;
int M[MAXN], A[MAXN], B[MAXN], rezA[MAXN], rezB[MAXN], AA[MAXN], BB[MAXN], nr[20], sum;
void mul(int A[], int B[])
{
int i, j, t, C[MAXN];
memset(C, 0, sizeof(C));
for (i = 1; i <= A[0]; i++)
{
for (t=0, j=1; j <= B[0] || t; j++, t/=10)
C[i+j-1]=(t+=C[i+j-1]+A[i]*B[j])%10;
if (i + j - 2 > C[0]) C[0] = i + j - 2;
}
memcpy(A, C, sizeof(C));
}
void sub(int A[], int B[])
{
int i, t = 0;
for (i = 1; i <= A[0]; i++)
A[i] += (t = (A[i] -= ((i <= B[0]) ? B[i] : 0) + t) < 0) * BASE;
for (; A[0] > 1 && !A[A[0]]; A[0]--);
}
inline bool compare (int A[MAXN], int B[MAXN])
{
if (A[0] > B[0]) return 1;
if (B[0] > A[0]) return 0;
for (int i = A[0]; i >= 1; i--)
{
if (A[i] > B[i])
return 1;
if (B[i] > A[i])
return 0;
}
return 0;
}
void cpy (int A[], int B[], int x)
{
int i;
memset (A, 0, sizeof (A));
for (i = 0; i <= x; i++)
A[i] = B[i];
}
int main ()
{
freopen ("prod.in", "r", stdin);
freopen ("prod.out", "w", stdout);
int i, aux, cif = 0;
for (i = 1; i <= 9; i++)
scanf ("%d", &nr[i]), sum += nr[i];
M[0] = 10000000;
for (i = 1; i <= 9; i++)
{
aux = nr[i];
while (aux)
{
cif += 1;
A[cif] = i;
B[cif] = i;
--aux;
}
}
B[0] = sum;
A[0] = 0;
while (sum)
{
--sum;
A[++A[0]] = B[1];
--B[0];
for (i = 1; i <= B[0]; i++)
B[i] = B[i + 1];
for (i = A[0]; i >= 0; i--)
AA[i] = A[i];
for (i = B[0] ; i >= 0 ; i--)
BB[i] = B[i];
if (compare (BB, AA) == 1)
{
sub (BB, AA);
if (compare (M, BB) == 1)
{
cpy (M, BB, BB[0]);
cpy (rezA, B, B[0]);
cpy (rezB, A, A[0]);
}
} else {
sub (AA, BB);
if (compare (M, AA) == 1)
{
cpy (M, AA, AA[0]);
cpy (rezA, A, A[0]);
cpy (rezB, B, B[0]);
}
}
}
mul (rezA, rezB);
for (i = rezA[0]; i >= 1; i--)
printf ("%d", rezA[i]);
return 0;
}