#include <iostream>

using namespace std;

int main()
{
    int px, py, a, b;
    cin >> px >> py >> a >> b;
    int tx, ty;
    cin >> tx >> ty;
    if (tx > px + a or tx < px or ty > py + b or ty < py)
    {
        cout << "nadvor" << endl;
        return 0;
    }
    else if (ty == py + b or tx == px + a or ty == py or tx == px)
    {
        cout << "strana" << endl;
        return 0;
    }
    else {cout << "vnatre" << endl;}
    return 0;
}