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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
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 46
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 54
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 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.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.next();
        int K = in.nextInt();
        int L = s.length();
        if (K >= L) {
            out.println((K+L) % 2 == 0 ? K+L : K+L-1);
        } else {
            int ret = K;
            for (int from = L-K-1; from >= 0; from--) {
                for (int len = L-from+K; len >= 2; len--) {
                    int minus = 0;
                    if (len % 2 != 0) {
                        minus++;
                    }
                    String prefix = s.substring(from, from + len/2);
                    String suffix = s.substring(from + len/2);
                    if (prefix.startsWith(suffix)) {
                        ret = Math.max(ret, len - minus);
                    }
                }
            }
            out.println(ret);
        }
    }
}

class InputReader {
    public BufferedReader reader;
    public StringTokenizer tokenizer;

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

    public String next() {
        while (tokenizer == null || !tokenizer.hasMoreTokens()) {
            try {
                tokenizer = new StringTokenizer(reader.readLine());
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return tokenizer.nextToken();
    }

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

}

