#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pil = pair<int, ll>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;
const int INF = 1e9;
const ll LLINF = 1e18;
const ll MOD = 1e9 + 7;
const double EPS = 1e-10;
template <class T>
inline bool chmax(T& a, T b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T>
inline bool chmin(T& a, T b) {
  if (a > b) {
    a = b;
    return 1;
  }
  return 0;
}
int main() {
  string s;
  cin >> s;
  int n = s.size();
  set<string> ss;
  for (int i = 0; i < n; i++) {
    int j = 0;
    while (i + j < n) {
      string t = s.substr(i, j);
      if (ss.find(t) == ss.end()) {
        ss.insert(t);
        break;
      } else {
        j++;
      }
    }
  }
  cout << ss.size() << endl;
}
