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 200
 6
 246
 220
 108
 6
 334
 280
 20
 266
 60
 10
 142
 58
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 134
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 400
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 60
 230
 8
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 46
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 54
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 2
 86

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

/**
 * 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 max = 0;
        
        if (k < s.length()){
            max = 2*k;
        } else {
            max = k + s.length();
            max = max - (max % 2);
        }

        for (int i=0; i<s.length(); i++){
            for (int j=i+1; j<s.length(); j++){
                int len = j-i;

                if (s.length() - j >= len){
                    String s1 = s.substring(i, j);
                    String s2 = s.substring(j, j+len);

                    if (s1.equals(s2)){
                        max = Math.max(max, 2*len);
                    }
                } else {
                    String s1 = s.substring(i,j);
                    String s2 = s.substring(j);
                    if (s1.startsWith(s2) && len-s2.length() <= k){
                        max = Math.max(max, 2*len);
                    }
                }
            }
        }


        out.println(max);
    }
}

class InputReader {
    public BufferedReader reader;
    public StringTokenizer tokenizer;


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

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

        return tokenizer.nextToken();
    }

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

}

