#include <bits/stdc++.h>
#define INF 990000000
//13
using namespace std;

int main() {
string s;
cin>>s;

if(s.find("OOO")>s.find("XXX")){
cout <<"EAST"<<endl;

}else if(s.find("OOO")<s.find("XXX")){
cout <<"WEST"<<endl;

}else{
cout <<"NA"<<endl;

}





}