import java.util.Scanner;

public class No509 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String N = sc.next();
		String n[] = N.split("");
		int ana = 0;
		int x[] = new int[n.length];
		for(int i = 0;i < n.length;i++) {
			x[i] = Integer.parseInt(n[i]);
		}
		for(int i = 0;i < n.length;i++) {
			switch(x[i]) {
			case 1:
			case 2:
			case 3:
			case 5:
			case 7:
				break;
			case 0:
			case 4:
			case 6:
			case 9:
				ana += 1;
				break;
			case 8:
				ana += 2;
			}
		}
		System.out.println(Math.min(2*n.length + ana + 1, 2*(ana + 1) + n.length));
	}
}