#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<ll> VL;
typedef vector<VL> VVL;
typedef pair<int, int> PII;

#define FOR(i, a, n) for (ll i = (ll)a; i < (ll)n; ++i)
#define REP(i, n) FOR(i, 0, n)
#define ALL(x) x.begin(), x.end()
#define MOD 1000000007
#define INF (1LL<<25)     //33554432
#define PI 3.14159265359
#define EPS 1e-12
//#define int ll

set<string> a;
void dfs(string s, string t) {
  if(s == "") {
    a.insert(t);
    return;
  }

  dfs(s.substr(1, s.size()-1), t+s[0]);
  dfs(s.substr(0, s.size()-1), t+s[s.size()-1]);
}

signed main(void)
{
  string s;
  cin >> s;
  dfs(s, "");

  cout << a.size() << endl;

  return 0;
}