#include #define REP(i,a,b) for(int i=(a);i<(b);i++) #define RREP(i,a,b) for(int i=(a);i>=(b);i--) #define pq priotity_queue typedef long long ll; typedef long double ld; using namespace std; const int INF=1e9, MOD=1e9+7, around[]={0,1,1,-1,-1,0,-1,1,0,0}; const ld PI=abs(acos(-1)); string s; int main(){ cin >> s; REP(i,0,s.size()){ if(s.substr(i,3)=="OOO"){cout << "East" << endl; return 0;} else if(s.substr(i,3)=="XXX"){cout << "West" << endl; return 0;} } cout << "NA" << endl; return 0; }