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 200
 6
 246
 220
 108
 6
 334
 280
 20
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 60
 10
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import java.io.InputStreamReader;
import java.io.IOException;
import java.util.InputMismatchException;
import java.io.PrintStream;
import java.io.BufferedReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.Writer;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 * @author Nipuna Samarasekara
 */
public class Main {
	public static void main(String[] args) {
		InputStream inputStream = System.in;
		OutputStream outputStream = System.out;
		FastScanner in = new FastScanner(inputStream);
		FastPrinter out = new FastPrinter(outputStream);
		TaskB solver = new TaskB();
		solver.solve(1, in, out);
		out.close();
	}
}

class TaskB {
    /////////////////////////////////////////////////////////////

    public void solve(int testNumber, FastScanner in, FastPrinter out) {
    String S=in.readLine();
        int k=in.nextInt();
      int ans=0;
//        if(S.length()<=k){
//             ans=S.length()+k;
//            ans-=ans%2;
//            out.println(ans);
//        }
        for (int len = 1; len <= (S.length()+k)/2; len++) {
            for (int st = 0; st+2*len <= S.length()+k; st++) {
             if(st+len>S.length()){
               int req= st+2*len-S.length();
                 if(k<=req)ans=Math.max(2*len,ans);
             }
             else if(st+2*len>S.length()){
                 int chk=S.length()-(st+len);
                 if(S.substring(st,st+chk).equals(S.substring(st+len,S.length()))){
                     ans=Math.max(2*len,ans);  
                 }
                 
                 
             }
            
             else if(S.substring(st,st+len).equals(S.substring(st+len,st+2*len))){
                 ans=len*2;
                 break;
             }
            }
        }
        out.println(ans);
    }
}

class FastScanner extends BufferedReader {

    public FastScanner(InputStream is) {
        super(new InputStreamReader(is));
    }

    public int read() {
        try {
            int ret = super.read();
//            if (isEOF && ret < 0) {
//                throw new InputMismatchException();
//            }
//            isEOF = ret == -1;
            return ret;
        } catch (IOException e) {
            throw new InputMismatchException();
        }
    }

    static boolean isWhiteSpace(int c) {
        return c >= 0 && c <= 32;
    }

    public int nextInt() {
        int c = read();
        while (isWhiteSpace(c)) {
            c = read();
        }
        int sgn = 1;
        if (c == '-') {
            sgn = -1;
            c = read();
        }
        int ret = 0;
        while (c >= 0 && !isWhiteSpace(c)) {
            if (c < '0' || c > '9') {
                throw new NumberFormatException("digit expected " + (char) c
                        + " found");
            }
            ret = ret * 10 + c - '0';
            c = read();
        }
        return ret * sgn;
    }

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

}

class FastPrinter extends PrintWriter {

    public FastPrinter(OutputStream out) {
        super(out);
    }

    public FastPrinter(Writer out) {
        super(out);
    }


}

