#include <bits/stdc++.h>
#define rep(i,n) for(int i=0; i<(n); i++)
using namespace std;
typedef long long ll;

int main(){
	string s; cin>>s;
	int m,b; m=b=0;
	for(auto x:s){
		if(x=='O'){
			m++;
			b=0;
		} else {
			m=0;
			b++;
		}
		if(m==3||b==3) break;
	}
	if(m==3) cout << "EAST" << endl;
	else if(b==3) cout << "WEST" << endl;
	else cout << "NA" << endl;	
}