import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main{
    public static void main(String args[]) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
        StringBuilder arr = new StringBuilder("");

        String num = br.readLine();
        int leng = num.length();
        int cnt = 1;
        int sum = 0;
        for(int i=leng-1;i>=0;i--) {
			if(num.charAt(i)=='1') {
				if(cnt%3==0) sum = sum+4;
				else if(cnt%3==1) sum = sum+1;
				else if(cnt%3==2) sum = sum+2;
			}
        	if(cnt%3==0 || cnt ==leng) {
        		arr = arr.append(Integer.toString(sum));
        		sum = 0;
        	}
        	cnt = cnt+1;
        }

        for(int j=arr.length()-1;j>=0;j--) {
        	bw.write(arr.charAt(j)+"");
        }

        bw.flush();
        bw.close();
    }
}