import java.util.Scanner;

class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt(),s1=0,s2=2,t[]=new int[10];
		sc.close();
		do {
			s1++;
			s2++;
			t[n%10]++;
			n/=10;
		}while(n>0) ;
		s1*=2;
		s1++;
		s1+=t[0];
		s1+=t[4];
		s1+=t[6];
		s1+=t[8]*2;
		s1+=t[9];
		s2+=t[0]*2;
		s2+=t[4]*2;
		s2+=t[6]*2;
		s2+=t[8]*4;
		s2+=t[9]*2;
		if(s1>s2) System.out.print(s2);
		else System.out.print(s1);
	}
}