import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class Main {

	@SuppressWarnings("resource")
	public static void main(String args[]) {
		Scanner scanner = new Scanner(System.in);
		String s=scanner.next();
		dfs(s);
		System.out.println(set.size()-1);
		
	}
	static Set<String>set=new HashSet<>();
	private static void dfs(String s) {
		if(set.contains(s)){
			return;
		}else{
			set.add(s);
		}
		for(int i=0;i<s.length()-1;i++){
			for(int j=i+1;j<s.length();j++){
				String st=swap(s,i,j);
				dfs(st);
			}
		}
		
	}

	private static String swap(String s, int i, int j) {
		String string[]=s.split("");
		String tmp=string[i];
		string[i]=string[j];
		string[j]=tmp;
		return String.join("", string);
	}
}