#include <iostream>

using namespace std;

int main()
{
    int x1,y1,x2,y2;
    cin>>x1>>y1>>x2>>y2;
    if(x1==x2)
    cout<<"verticala";
    else
    {
    if(y1==y2)
    cout<<"orizontala";
    else
    cout<<"oblica";
    }
    return 0;
}