#include <iostream>
#include <cstring>
using namespace std;

int main()
{
int a;
char Arr[30];
cin>>Arr;
for(int i=0;i<30;i++)
{
    if( Arr[i] == Arr[i+1] == Arr[i+2] == Arr[i+3] == Arr[i+4])
    a++;
}
if (a==5)
    cout<<"verno";
    else
    cout<<"net";
return 0;}