#include <iostream>
#include <cmath>
#include <vector>
#include <algorithm>
#include <string>
#include <queue>
#include <unordered_map>
#include <iomanip>
#include <stack>
#include <set>
#define int long long
using namespace std;
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

signed main() {
    string s;
    cin >> s;
    int n = (int)s.size();
    vector<string> str;
    vector<int> space;
    string now = "";
    for (int i = 0; i < n; ++i){
        if (s[i] == '.'){
            if (now == ""){
                continue;
            }
            str.push_back(now);
            space.push_back(now.size());
            now = "";
        }
        else{
            now += s[i];
        }
    }
    if (now != ""){
        str.push_back(now);
        space.push_back(now.size());
    }
    sort(str.begin(), str.end());
    int j = 0;
    for (int i = 0; i < n; ++i){
        if (s[i] == '.'){
            cout << s[i];
            continue;
        }
        cout << str[j];
        i += space[j] - 1;
        ++j;
    }

}
/*
 5
 aca
 aba
 aba
 cab
 bac
 */