#include <bits/stdc++.h>
using namespace std;

void DirectionalMove () {

    char a[] = {'W', 'S', 'W', 'N'};
    int t, n;
    int s;
    cin >> t;
    int pos=0;

    while(t--){
        cin >> n;
        for(int i = 0; i < n; i++){
            cin >> s;
            if(s == 0) {
                pos-=1;
            }
            else if(s == 1) {
                pos+=1;
            }
        }
        cout << a[pos];
        pos = 0;
    }
}
int main() {
    DirectionalMove();
    return 0;
}