#include <iostream>
#include <vector>
#include <cmath>
#include <set>
#include <deque>
#include <queue>
#include <algorithm>
#include <stack>
#include <map>
#include <string>
#include <iomanip>
#include <fstream>
#include <unordered_map>
#define all(v) v.begin(), v.end()
#define ll long long
#define ld long double
#define lb lower_bound
#define ub upper_bound
#define len(v) (ll)v.size()
#define last(v) (ll)v[len(v) - 1]
using namespace std;
const ll inf = 1e9;
const ll MAXN = 1e6 + 1;
const ll MAXM = 1e5 + 1;
const int logn = 29;
template<class T>
istream& operator>>(istream& in, vector<T>& a) {
    for (auto& i : a)
        in >> i;
    return in;
}
template<class T>
ostream& operator<<(ostream& out, vector<T>& a) {
    for (auto& i : a)
        out << i << " ";
    return out;
}

struct node {
    node* next[26];
    short int strings;
    node() {
        for (int i = 0; i < 26; i++) {
            next[i] = nullptr;
        }
        strings = 0;
    }
};

node* root = new node();
void add(string s) {
    node* curv = root;
    for (int i = 0; i < len(s); ++i) {
        char c = s[i];
        if (curv->next[c - 'a'] == nullptr) {
            curv->next[c - 'a'] = new node();
        }
        curv = curv->next[c - 'a'];
    }
    curv->strings++;
}

vector<int> c;

string s;
string ans = "";
string cur_str = "";
int curi = 0;
void write(node* v = root) {
    for (int i = 0; i < v->strings; i++) {
        /*while (s[curi] == '.') {
            ans += '.';
            ++curi;
        }
        ans += cur_str;
        while (s[curi] != '.') ++curi;*/
        cout << cur_str;
        cout << string(c[curi], '.');
        curi++;
    }

    for (int i = 0; i < 26; i++) {
        if (v->next[i] != nullptr) {
            cur_str.push_back('a' + i);
            write(v->next[i]);
            cur_str.pop_back();
        }
    }
}



void solve() {
    /*cin >> s;
    s += '.';
    bool f = 0;
    if (s[0] != '.') f = 1;
    string cur = "";
    for (int i = 0; i < len(s); ++i) {
        if (s[i] == '.' && f) {
            f = 0;
            add(cur);
            cur = "";
        }
        else if (s[i] != '.' && !f) {
            f = 1;
            cur += s[i];
        }
        else if (s[i] != '.' && f) cur += s[i];
    }
    while (s[curi] == '.' && curi < (len(s) - 1)) {
        ans += '.';
        ++curi;
    }
    write();
    while (s[curi] == '.' && curi < (len(s) - 1)) {
        ans += '.';
        ++curi;
    }
    cout << ans;*/

    cin >> s;
    string curstr = "";
    int cnt = 0;
    for (int i = 0; i < len(s); ++i) {
        if (s[i] == '.') {
            ++cnt;
            if (curstr.size() > 0) add(curstr);
            //cout << curstr << endl;
            curstr = "";
        } else {
            if (cnt > 0) c.push_back(cnt);
            cnt = 0;
            curstr += s[i];
        }
    }
    if (cnt > 0) c.push_back(cnt);
    if (curstr.size() > 0) {
        add(curstr); //cout << curstr << endl;
    }
    c.push_back(0);

    if (s[0] == '.') cout << string(c[curi++], '.');
    write();
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

    solve();

    return 0;
};