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 6
 246
 220
 108
 6
 334
 280
 20
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 60
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import java.io.InputStreamReader;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.Reader;
import java.util.StringTokenizer;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 * @author Vadim
 */
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 = Integer.parseInt(in.next());
        if(k >= s.length()) {
            int ans = k+s.length();
            if(ans %2 == 1) {
                ans --;
            }
            out.println(ans);
        } else {
            int max = 2*k;
            int n = s.length();
            for (int i = n-1; i >= n/2; i--) {//todo:
                String sub = s.substring(i);
                int start = i-(n+k-i);
                if(start < 0) {
                    start = 0;
                }
                for (int j = start; j <= i-(n-i); j++) {
                    boolean match = true;
                    for (int l = 0; l < sub.length(); l++) {
                        if(s.charAt(j+l)!=sub.charAt(l)) {
                            match = false;
                            break;
                        }
                    }
                    if(match) {
                        max = Math.max((i-j)*2, max);
                    }
                }


            }
            int maxLen = max/2;
            for (int i = 0; i < n; i++) {
                for (int j = maxLen; j <= n/2+1; j++) {
                    if(i+j+j-1 >= n) {
                        break;
                    }
                    boolean match = true;
                    for (int l = 0; l < j; l++) {
                        if(s.charAt(i+l) != s.charAt(i+j+l)) {
                            match = false;
                            break;
                        }
                    }
                    if(match) {
                        max = Math.max((j)*2, max);
                    }
                }
            }
            out.println(max);

        }
    }
}

class InputReader  extends BufferedReader {
    public InputReader(InputStream st) {
        super(new InputStreamReader(st));
    }
    public StringTokenizer tokenizer;

    public String next() {
        while (tokenizer == null || !tokenizer.hasMoreTokens()) {
            tokenizer = new StringTokenizer(readLine());
        }
        return tokenizer.nextToken();
    }

    public String readLine() {
        try {
            return super.readLine();
        } catch (IOException e) {
            return null;
        }
    }


}
