#include <stdio.h>
#include <string.h>
#include <algorithm>

const int MAX_CIF = 1000;

void mul(int A[], int B[]) {
  int i, j, t, C[1 + MAX_CIF + MAX_CIF];
  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));
}
bool bigger(int A[], int B[]) {
  if (A[0] < B[0]) {
	return false;
  } else if (A[0] > B[0]) {
	return true;
  } else {
	for (int i = A[0]; i > 0; i--) {
	  if (A[i] < B[i])
	    return false;
	  else if (A[i] > B[i])
	    return true;
	}
  }
  return true;
}

void print(int A[]) {
  for (int i = A[0]; i > 0; i--)
	printf("%d", A[i]);
  printf("\n");
}

int main() {

  freopen("prod.in", "r", stdin);
  freopen("prod.out", "w", stdout);

  int freq[10];
  for (int i = 1; i <= 9; i++)
	scanf("%d", &freq[i]);
  int a[1 + MAX_CIF], b[1 + MAX_CIF];
  a[0] = 0; b[0] = 0;
  for (int i = 9; i > 0; i--)
	for (int j = 1; j <= freq[i]; j++) {
	  if (bigger(a, b))
	    b[++b[0]] = i;
	  else
		a[++a[0]] = i;
    }
  std::reverse(a + 1, a + a[0] + 1);
  std::reverse(b + 1, b + b[0] + 1);
  mul(a, b);
  print(a);

  fclose(stdin);
  fclose(stdout);

  return 0;
}