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

int main() {
string s;
cin>>s;
int o=0;
int x=0;
if(s.find("OOO")==string::npos)o=(int)s.size()+1;
else
o=s.find("OOO");

if(s.find("XXX")==string::npos)x=(int)s.size()+1;
else
x=s.find("XXX");

//cout <<x<<"  "<<o<<endl;


if(o>x){
cout <<"WEST"<<endl;

}else if(o<x){
cout <<"EAST"<<endl;

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

}





}