import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.Arrays; import java.util.InputMismatchException; import java.io.OutputStream; import java.util.StringTokenizer; import java.io.BufferedReader; import java.io.InputStreamReader; import java.util.HashMap; import java.util.Map; import java.util.ArrayList; import java.util.List; import java.util.Scanner; /** * Built using CHelper plug-in * Actual solution is at the top */ public class Main { public static void main(String[] args) { InputStream inputStream = System.in; OutputStream outputStream = System.out; InputReader in = new InputReader(inputStream); PrintWriter out = new PrintWriter(outputStream); Task solver = new Task(); solver.solve(1, in, out); out.close(); } static class Task { public void solve(int testNumber, InputReader in, PrintWriter out) { String S = in.next(); int e=0; int w=0; String res = "NA"; for(int i=0; i