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

public class Main {
	
	public static void dfs(int first, int last, char[] in, String create, Set<String> result){
		if(first > last){
			result.add(create);
		}else{
			dfs(first + 1, last, in, create + in[first], result);
			dfs(first, last - 1, in, create + in[last], result);
		}
	}
	
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		final char[] inputs = sc.next().toCharArray();
		Set<String> result = new HashSet<String>();
		
		dfs(0, inputs.length - 1, inputs, "", result);
		
		System.out.println(result.size());
		
	}
	
}