#include<iostream>
using namespace std;

string k ;
int ks ;
int u[100001] ;
int n[100001] ;

void S( )
    {
    cin >> ks ;
    cin >> k ;
    for ( int i = ks-1 ; i >= 0 ; i-- )
        {
        if ( i < ks-1 ) u[i] = u[i+1] ;
        if ( i < ks-1 ) n[i] = n[i+1] ;
        if ( k[i] == ')' ) u[i]++ ;
        if ( k[i] == '(' ) n[i]++ ;
        }
    }

void E( )
    {
    int ul = 0 , nl = 0 ;
    for ( int i = 0 ; i < ks ; i++ )
        if ( k[i] == ':' ) { ul = ul + u[i+1] ; nl = nl + n[i+1] ; }
    if ( ul > nl ) cout << "positive" << endl ;
    else if ( ul < nl ) cout << "negative" << endl ;
    else cout << "neutral" << endl ;
    }

int main()
{
    #ifdef ONLINE_JUDGE
    freopen("smile.in", "r", stdin);
    freopen("smile.out", "w", stdout);
    #endif

    S( ) ;

    E( ) ;
    return 0 ;
}