import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.Set;

public class No170 {
    static Set<String> set = new HashSet<String>();

    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(
                    System.in));
            String S = br.readLine();

            perm1(S);

            System.out.println(set.size() - 1);
        } catch (Exception e) {
            System.err.println("Error:" + e.getMessage());
        }
    }

    public static void perm1(String s) {
        perm1("", s);
    }

    private static void perm1(String prefix, String s) {
        int N = s.length();
        if (N == 0)
            set.add(prefix);
        // System.out.println(prefix);
        else {
            for (int i = 0; i < N; i++)
                perm1(prefix + s.charAt(i),
                        s.substring(0, i) + s.substring(i + 1, N));
        }

    }

}