import java.util.*;

public class Main {
    
    public static void main(String[] args) {
        
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String bin = "";
        int[] cnt = new int[8];
        for( int i = 0; i < s.length(); i++ ) {
            String ch = s.substring(i,i+1);
            int d = Integer.parseInt(ch,16);
            String ad = Integer.toString(d,2);
            bin += ad;
        }
        
        for( int i = bin.length(); i > 0; i-=3 ){
            String row = bin.substring(Math.max(0,i-3),i);
            int k = Integer.parseInt(row,2);
            cnt[k]++;
        }
        
        int max = 0;
        for( int i = 0; i < 8; i++ ) {
            max = Math.max(max,cnt[i]);
        }
        
        for( int i = 0; i < 8; i++ ) {
            if( cnt[i] == max ) {
                System.out.print(i+" ");
            }
        }
        
        System.out.println();
        
    }
    
}