#include <bits/stdc++.h>
using namespace std;
const int maxn = 50010;
int n;
char s[maxn];
int main() {
  while (scanf("%s", s) != EOF) {
    n = strlen(s);
    int len = 1;
    while (len <= n / 2) {
      int cnt = 0, start = len;
      for (int i = len; i < n; i++) {
        if (cnt == len) break;
        if (s[i] != s[i - len]) {
          start = i + 1;
          cnt = 0;
        } else
          cnt++;
      }
      if (cnt == len) {
        for (int i = start + len; i < n; i++) s[i - len] = s[i];
        n -= len;
        s[n] = '\0';
      } else
        len++;
    }
    printf("%s\n", s);
  }
  return 0;
}
