Untitled

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

string result;

string words(string str)
{
    for (int i = 0; i < str.length(); i++)
    {
        if (str[i] != '_') result[i] = str[i];
    }
    return result;
}

int main()
{
    string str;
    int n;
    cin >> n;
    result.resize(n + 1);

    for (int i = 0; i < n; i++)
    {
        cin >> str;
        words(str);
    }
    cout << result << endl;
}