#include <bits/stdc++.h>
using namespace std;

#define DUMP(x) cerr << #x << "=" << x << endl
#define DUMP2(x, y) cerr<<"("<<#x<<", "<<#y<<") = ("<<x<<", "<<y<<")"<< endl
#define BINARY(x) static_cast<bitset<16> >(x)

#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define REP(i,m,n) for (int i=m;i<(int)(n);i++)

#define in_range(x, y, w, h) (0<=(int)(x) && (int)(x)<(int)(w) && 0<=(int)(y) && (int)(y)<(int)(h))
#define ALL(a) (a).begin(),(a).end()

typedef long long ll;
const int INF   = 1e9;
const ll  INFLL = 1e18;
typedef pair<int, int> PII;
int dx[4]={0, -1, 1, 0}, dy[4]={-1, 0, 0, 1};

string S;
int N;
set<string> ans;

void dfs(int l, int r, string s)
{
    if (s.size() == N) {
        ans.insert(s);
        return;
    }

    dfs(l+1, r, s + S[l]);
    dfs(l, r-1, s + S[r]);
}

int main()
{
    ios::sync_with_stdio(false);
    cin >> S;
    N = S.size();
    dfs(0, N-1, "");
    cout << ans.size() << endl;
}