#include<fstream.h>

long i, aux, a[10],x[1001],y[1001],j,c[2002];

int compar()
{
	long i;
	if (x[0] > y[0]) return 1;
		else if (x[0] < y[0]) return 0;
	else
	{
		for (i=1;i<=x[0];i++)
			if (x[i]>y[i]) return 1;
				else if (x[i]<y[i]) return 0;
	}
	return 0;
}

void imultire()
{
	long i,j;
	for (i = 1;i<=x[0];i++)
		for (j = 1;j<=y[0];j++)
		{
			if (i-j+1!=1)
			{c[j-i+1] = x[i]*y[j]+c[j-i]/10;
			c[j-i] %= 10;}
			else {c[j-i+1] = x[i]*y[j];}
			
		}
	c[0] = j-i+1;
	if (c[c[0]]>9)
	{
		c[c[0]+1] = c[c[0]]/10;
		c[c[0]]%=10;
		c[0]++;
	}
}

int main()
{
	ifstream f("prod.in");
	ofstream g("prod.out");
	
		for (i=1;i<=9;i++)
			f>>a[i];
		for (i=9;i>=5;i--)
		{
			aux = a[i];
			a[i] = a[10-i];
			a[10-i] = aux;
		}
	
		for (i=1;i<=9;i++)
		{
			for (j=1;j<=a[i];j++)
			{
				if (compar()==0)
				{
					x[++x[0]] = 10-i;
				}
				else 
				{
					y[++y[0]] = 10-i;
				}
			}
		}
		if (x[0]!=1)
		for (i=1;i>=x[0]/2;i--)
		{
			aux = x[i];
			x[i] = x[x[0]+1-i];
			x[x[0]+1-i] = aux;
		}
		if (y[0]!=1)
		for (i=1;i>=y[0]/2;i--)
		{
			aux = y[i];
			y[i] = y[y[0]+1-i];
			y[y[0]+1-i] = aux;
		}
		
		imultire();
		
		for (i=c[0];i>=1;i--)
			g<<c[i];
		g<<'\n';
		
	g.close();	
	return 0;
}