import java.io.BufferedReader;
import java.io.InputStreamReader;

public class No197 {

    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(
                    System.in));
            String SBefore = br.readLine();
            int N = Integer.parseInt(br.readLine());
            String SAfter = br.readLine();

            // コインの枚数を数える
            int bCoin = 0;
            int aCoin = 0;
            for (int i = 0; i < args.length; i++) {
                if (SBefore.substring(i, i + 1).equals("o")) {
                    bCoin++;
                }
                if (SAfter.substring(i, i + 1).equals("o")) {
                    aCoin++;
                }
            }

            String str = "FAILURE";
            if (aCoin != bCoin) {
                str = "SUCCESS";
            } else {

                if (N == 0 && !SBefore.equals(SAfter)) {
                    str = "SUCCESS";
                } else if (N == 1) {
                    if (!swap(SBefore, true).equals(SAfter)
                            && !swap(SBefore, false).equals(SAfter)) {
                        str = "SUCCESS";
                    }
                }

            }
            System.out.println(str);
        } catch (Exception e) {
            System.err.println("Error:" + e.getMessage());
        }
    }

    // trueなら左
    // falseなら右
    static String swap(String S, boolean changeSide) {
        char[] c = S.toCharArray();
        char swap = c[1];
        if (changeSide) {
            c[1] = c[0];
            c[0] = swap;
        } else {
            c[1] = c[2];
            c[2] = swap;
        }

        return new String(c);

    }

}