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

int main() {
	string S;
	int E = 0, W = 0;
	cin >> S;
	for (int i = 0; i < S.size(); i++) {
		if (S[i] == 'O') E++, W = 0;
		else W++, E = 0;
		if (E == 3 || W == 3) break;
	}
	if (E == 3) cout << "East";
	else if (W == 3) cout << "West";
	else cout << "NA";
	cout << endl;
}