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

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);

    string s; cin >> s;
    if(s.size() <= 2){
        cout << "NA" << endl;
        return 0;
    }

    rep(i,s.size()-2){
        if(s[i] == s[i+1] && s[i+1] == s[i+2]){
            if(s[i] == 'O') cout << "East" << endl;
            else cout << "West" << endl;
            return 0;
        }
    }
    cout << "NA" << endl;
}