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

public class Main {
    static HashSet<String> all = new HashSet<>();
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        char[] values = sc.next().toCharArray();
        calc(values, 0, values.length - 1, "");
        System.out.println(all.size());
    }
    
    static void calc(char[] values, int left, int right, String base) {
        if (right < left) {
            all.add(base);
            return;
        }
        calc(values, left + 1, right, base + values[left]);
        calc(values, left, right - 1, base + values[right]);
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}