import java.util.*;

public class Main {
    static HashSet<String> all = new HashSet<>();
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] arr = sc.next().toCharArray();
        calc(new StringBuilder(), arr, 0, arr.length - 1);
        System.out.println(all.size());
    }
    
    static void calc(StringBuilder sb, char[] arr, int left, int right) {
        if (left > right) {
            all.add(sb.toString());
            return;
        }
        sb.append(arr[left]);
        calc(sb, arr, left + 1, right);
        sb.deleteCharAt(sb.length() - 1);
        sb.append(arr[right]);
        calc(sb, arr, left, right - 1);
        sb.deleteCharAt(sb.length() - 1);
    }
}