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64
 200
 6
 246
 220
 108
 6
 334
 280
 20
 266
 60
 10
 142
 58
 120
 134
 172
 400
 186
 60
 230
 8
 190
 46
 74
 54
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 12
 2
 86

import java.io.InputStreamReader;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.StringTokenizer;
import java.math.BigInteger;
import java.io.InputStream;

/**
 * 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);
		TaskB solver = new TaskB();
		solver.solve(1, in, out);
		out.close();
	}
}

class TaskB {
    public void solve(int testNumber, InputReader in, PrintWriter out) {
        String s = in.nextString();
        int k = in.nextInt();
        for (int i = 0; i < k; ++i) s += "?";
        int l;
        for (l = s.length(); l >= 1; --l) {
            boolean ok = true;
            if (l % 2 == 1) continue;
            int l2 = l / 2;
            outer: for (int start = 0; start + l - 1 < s.length(); ++start) {
                ok = true;
                for (int i = start, j = 0; j < l2; ++i, ++j) {
                    if (s.charAt(start) == '?' || s.charAt(start + l2) == '?' || s.charAt(start) == s.charAt(start + l2)) {
                        //
                    } else {
                        ok = false;
                        break;
                    }
                }
                if (ok) break outer;
            }
            if (ok) break;
        }
        out.println(l);
    }
}

class InputReader {
    private BufferedReader reader;
    private StringTokenizer stt;

    public InputReader(InputStream stream) {
        reader = new BufferedReader(new InputStreamReader(stream));
    }

    public String nextLine() {
        try {
            return reader.readLine().trim();
        } catch (IOException e) {
            return null;
        }
    }

    public String nextString() {
        while (stt == null || !stt.hasMoreTokens()) {
            stt = new StringTokenizer(nextLine());
        }
        return stt.nextToken();
    }

    public int nextInt() {
        return Integer.parseInt(nextString());
    }

}

