35

// 35
#include <iostream>
#include <string>

using namespace std;

/*
тест
ss aa aab a b hhhh ss d sd sdd asdd nsha reol asa sd
*/

int main()
{
    int maxSize = 0;
    string word, str = "";
    while(cin >> word){
        if(word.size() > maxSize){
            maxSize = word.size();
            str.erase();
            str += word + " ";
            continue;
        }
        if(word.size() == maxSize){
            str += word + " ";
            continue;
        }
    }
    cout << str;
    return 0;
}