#include <bits/stdc++.h>

using namespace std;
string words[20];

bool checker(const string &a, const string &b) { return a.size() < b.size(); }

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
  freopen("b8.inp", "r", stdin);

  int n = 0;
  while (cin >> words[n] && n < 20)
    n++;

  stable_sort(words, words + n, checker);
  for (int i = 0; i < n; i++) {
    cout << words[i] << " ";
  }
  cout << '\n';
}