#include <bits/stdc++.h>
using namespace std;
void write(int& ans,map<string,bool>& mp,int left,int right,string addition,string s){
    if(right-left==1){
        if(mp[addition+s[left]]==false){
            mp[addition+s[left]]=true;
            ans++;
        }
    }else{
        write(ans,mp,left+1,right,addition+s[left],s);
        write(ans,mp,left,right-1,addition+s[right-1],s);
    }
}

int main(){
    string s;
    map<string,bool> mp;
    cin>>s;
    int ans=0;
    write(ans,mp,0,s.size(),"",s);
    cout<<ans;
}