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 200
 6
 246
 220
 108
 6
 334
 280
 20
 266
 60
 10
 142
 58
 120
 134
 172
 400
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 60
 230
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 2
 86

import java.io.*;
import java.util.Arrays;
import java.util.StringTokenizer;

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();
  }
}

class Task {
  public void solve(int testNumber, InputReader in, PrintWriter out) {
    String s = in.next();
    int k = in.nextInt();
    char[] c = new char[s.length() + k];
    Arrays.fill(c, '?');
    for (int i = 0; i < s.length(); i++) {
      c[i] = s.charAt(i);
    }
    int n = c.length;
    for (int len = n; len >= 2; len--) {
      if (len % 2 != 0) {
        continue;
      }
      int half = len / 2;
      for (int i = 0; i + len <= n; i++) {
        boolean ok = true;
        for (int j = 0; j < half; j++) {
          char c1 = c[i + j];
          char c2 = c[i + j + half];
          if (c1 != c2 && c1 != '?' && c2 != '?') {
            ok = false;
            break;
          }
        }
        if (ok) {
          System.out.println(len);
          return;
        }
      }
    }
    throw new RuntimeException("wtf?");
  }
}

class InputReader {
  private BufferedReader reader;
  private StringTokenizer tokenizer;

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

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

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