split_string

#include <iostream>
using namespace std;
#include <algorithm>
#include <cmath>
#include <vector>
#include <sstream>



vector<string> split(const string& s) {
    vector <string> res;
    string cur = "";
    int n = s.size();
    for (int i = 0; i < n; ++i) {
        if (s[i] == ' ') {
            if (cur != "") {
                res.push_back(cur);
                cur = "";
            }
        } else {
            cur += s[i];
        }
    }
    return res;
}

int main()
{
    string s;
    getline(cin, s);
    s += ' ';
    auto v = split(s);
    for (string i: v) {
        cout << i << ' ';
    } cout << "\n";
}