#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC target("sse4")
using namespace std;
using ii = pair<int, int>;
using ll = long long;
const int N = 1e5 + 5;
const int mod = 1e9 + 7;
char str1[50005], str2[50005];
int n, m;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cin >> str1;
  n = strlen(str1);
  for (int sz = 1; sz <= n / 2; sz++) {
    m = sz;
    int cur = 0;
    for (int i = sz; i < n; i++) {
      if (str1[i] == str1[i - sz])
        cur++;
      else
        cur = 0;
      str2[m++] = str1[i];
      if (cur == sz) cur = 0, m -= sz;
    }
    for (int i = sz; i < m; i++) str1[i] = str2[i];
    n = m;
  }
  for (int i = 0; i < n; i++) cout << str1[i];
  return 0;
}
