import java.util.*;
import java.awt.geom.*;
import java.io.*;

class Main {
	static HashMap<String,Boolean> map = new HashMap<String,Boolean>();
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String in = sc.next();
		StringBuilder a = new StringBuilder(in);
		dfs(a);
		System.out.println(map.size()-1);
	}
	
	static void dfs(StringBuilder a) {
		ArrayDeque<StringBuilder> queue = new ArrayDeque<StringBuilder>();
		queue.add(new StringBuilder(a));
		while(!queue.isEmpty()) {
			a = queue.pollFirst();
			String t = a.toString();
			if(map.containsKey(a.toString())) continue;
			map.put(a.toString(), true);
			int tmp = a.length();
			for(int i = 0; i < tmp; i++) {
				char b = a.charAt(i);
				for(int j = i+1; j < tmp; j++) {
					a = a.replace(i, i+1, String.valueOf(a.charAt(j)));
					a = a.replace(j, j+1, String.valueOf(b));
					queue.add(new StringBuilder(a));
					a = new StringBuilder(t);
				}
			}
		}
	}
}