3.11

#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <map>
using namespace std;



ifstream fin("input.txt");
ofstream out("output.txt");

int main()
{
    while (fin.peek() != EOF)
    {
        string s;
        getline(fin, s);
        if (s.find(' ') == string::npos)
            continue;
        else
            out << s << endl;
    }
}