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

int main(){
	const char *s = "OXOOXXX";
	if(strstr(s,"OOO")==0){
		cout << "West" << endl;
		return 0;
	}
	else if(strstr(s,"XXX")==0){
		cout << "East" << endl;
		return 0;
	}
	else
		cout << "NA" << endl;
}