import java.io.BufferedReader;
import java.io.InputStreamReader;
 
public class Main{
    public static void main(String[] args) throws Exception{
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        String str = null;
        while((str=bf.readLine())!=null){
            //int n=Integer.parseInt(str);
            char s[]=str.toCharArray();
            int sum=0;
            int num;
            int jinzhi[]={1,16,16*16,16*16*16,16*16*16*16,16*16*16*16*16,16*16*16*16*16*16};
            int j=0;
            for(int i=s.length-1;i>=2;i--){
                if(s[i]-'0'>=17&&s[i]-'0'<=22){
                    num=s[i]-'0'-7;
                    sum=num*jinzhi[j]+sum;
                    j++;
                }
                if(s[i]-'0'>=0&&s[i]-'0'<=9){
                    num=s[i]-'0';
                    sum=num*jinzhi[j]+sum;
                    j++;
                }
                //sum=sum+s[i]*jinzhi[2];
                
            }
            System.out.println(sum);
            //System.out.println(n);
            //System.out.println(str);
            //System.out.println(n);
            }
    }
}