import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int[] holes = new int[]{1, 0, 0, 0, 1, 0, 1, 0, 2, 1};
        int line = 0;
        int inside = 0;
        for (char c : sc.next().toCharArray()) {
            line++;
            inside += holes[c - '0'];
        }
        int min = Math.min(line * 2 + inside + 1, (1 + inside) * 2 + line);
        System.out.println(min);
    }
}

class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public String next() throws Exception {
        if (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
}