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 6
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 220
 108
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 280
 20
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;

public class BSolver {
  private static InputReader in;
  private static PrintWriter out;

  public static void main(String[] args) throws IOException {
    InputStream is = System.in;
    PrintWriter pw = new PrintWriter(System.out);
    init(is, pw);
    solve();
    is.close();
    out.close();
  }

  public static void init(InputStream is, PrintWriter pw) {
    in = new InputReader(is);
    out = pw;
  }

  static String str;
  static int k;
  static int n;

  public static void solve() {
    str = in.next();
    n = str.length();
    k = in.ni();

    if (k >= n) {
      int sum = k + n;
      out.println(sum + ((sum & 1) == 1 ? -1 : 0));
    } else {
      int lenWithoutK = getLenWithoutK();
      int lenWithK = Math.max(getLenWithK(), 2 * k);
      //System.out.println(lenWithoutK + " " + lenWithK);
      out.println(Math.max(lenWithoutK, lenWithK));
    }
  }

  static int getLenWithoutK() {
    int maxLen = Integer.MIN_VALUE;
    for (int i = 0; i < n; i++) {
      for (int len = 2; i + len <= n; len += 2) {
        String first = str.substring(i, i + len / 2);
        String second = str.substring(i + len / 2, i + len);
        if (first.equals(second)) {
          maxLen = Math.max(maxLen, len);
        }
      }
    }
    return maxLen;
  }

  static int getLenWithK() {
    int maxLen = Integer.MIN_VALUE;
    for (int len = 1; len < n; len++) {
      for (int j = 0; j <= k; j++) {
        int ind1 = n - len;
        int ind2 = ind1 - j - len;

        if (ind2 < 0) {
          break;
        }
        String first = str.substring(ind1, n);
        String second = str.substring(ind2, ind1 - j);
        //System.out.println(first + " " + second);
        if (first.equals(second)) {
          maxLen = Math.max(maxLen, 2 * (len + j));
        }
      }
    }
    return maxLen;
  }

  private static class InputReader {
    BufferedReader br;
    StringTokenizer st;

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

    String next() {
      while (st == null || !st.hasMoreElements()) {
        try {
          st = new StringTokenizer(br.readLine());
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
      return st.nextToken();
    }

    int ni() {
      return Integer.parseInt(next());
    }

    long nl() {
      return Long.parseLong(next());
    }

    int[] na(int n) {
      int[] arr = new int[n];
      for (int i = 0; i < n; i++) {
        arr[i] = ni();
      }
      return arr;
    }
  }
}
