#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;
#ifdef _WIN32
#include <Windows.h>
#endif

int main()
{
    #ifdef _WIN32
        SetConsoleOutputCP(CP_UTF8);
        setvbuf(stdout, nullptr, _IOFBF, 1024);
    #endif
    int cnt = 0, max1 = 0;
    string s, t, tmp = "";
    cin >> s;
    t = "ｗ";
    vector<string> ans;
    string::size_type pos = 0;
    while (s.begin() + pos != s.end()){
        if (s.substr(pos, 3) == t){
            cnt++;
            if (cnt > max1){
                max1 = cnt;
            }
        } else {
            if (cnt > 0) {
                if (cnt == max1) ans.push_back(tmp);
                tmp = "";
                cnt = 0;
            }
            tmp += s.substr(pos, 3);
        }
        pos += 3;
    }
    if (cnt == max1) ans.push_back(tmp);
    for (auto x : ans){
        cout << x << " ";
    }
    cout << endl;
    
}