import java.util.Scanner;

public class Nikola2 {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int newTotal = 0;
		int [] coins = new int[3];
		int [] values = new int[3];
		values[0] = 1;
		values[1] = 2;
		values[2] = 5;
		for(int i=0; i<3; i++)
			coins[i] = in.nextInt();
		int p = in.nextInt();

		for(int i=2; i>=0; i--)
		{
			while(p>0)
			{
				p-=values[i];
				coins[i]--;
				if(p<0)
					{
						p+=values[i];
						coins[i]++;
						break;
					}
				else if(coins[i]==0 || p==0)
					{
						break;
					}
			}
			newTotal+=coins[i];
		}
		System.out.println(newTotal);

	}
}