import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.StringTokenizer;

public class Letterle {

    static BufferedReader br;
    static PrintWriter out;
    static StringTokenizer st;

    public static void main(String[] args) throws IOException {
        br = new BufferedReader(new InputStreamReader(System.in));
        out = new PrintWriter(new OutputStreamWriter(System.out));
        // br = new BufferedReader(new FileReader("in.txt"));
        // out = new PrintWriter(new FileWriter("out.txt"));

        String s = readLine();
        String output = "";
        boolean met = false;

        for (int i = 0; i < 7; i++) {
            String guess = readLine();
            if (guess.equals(s)) {
                out.println("WINNER");
                met = true;
                break;
            }
            output = "";
            for (int j = 0; j < guess.length(); j++) {
                char guessChar = guess.charAt(j);
                if (s.indexOf(guessChar) != -1) {
                    if (guessChar == s.charAt(j)) {
                        output += "G";
                    } else {
                        output += "Y";
                    }
                } else {
                    output += "X";
                }
            }

            if (i == 6) {
                if (!output.equals("WINNER") && !met) {
                    out.println("LOSER");
                    break;
                }
            } else {
                out.println(output);
            }
        }

        out.close();
    }

    static String next() throws IOException {
        while (st == null || !st.hasMoreTokens())
            st = new StringTokenizer(br.readLine().trim());
        return st.nextToken();
    }

    static long readLong() throws IOException {
        return Long.parseLong(next());
    }

    static int readInt() throws IOException {
        return Integer.parseInt(next());
    }

    static double readDouble() throws IOException {
        return Double.parseDouble(next());
    }

    static char readCharacter() throws IOException {
        return next().charAt(0);
    }

    static String readLine() throws IOException {
        return br.readLine().trim();
    }
}