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 108
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 280
 20
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import java.io.*;
import java.util.*;

import com.sun.org.apache.bcel.internal.generic.ARRAYLENGTH;

public class CodeForces {

	public void solve() throws IOException {
		int res = 0;
		String str = nextLine();		
		int n = nextInt();
		for (int i = 0; i < n; i++) {
			str+='?';
		}
		char[] arr = str.toCharArray();
		for (int i = 0, l = arr.length; i < l; i++) {
			for (int j = i+1; j < l; j++) {
				int t = 0;
				while(i+t<j && j+t<l && (arr[i+t]==arr[j+t] || arr[j+t]=='?')){
					t++;
				}
				res = Math.max(res, t);
			}
		}
		
		
		System.out.println(2*res);
	}

	public static void main(String[] args) {
		new CodeForces().run();
	}

	int NOD(int a, int b) {
		while (a != 0 && b != 0) {
			if (a >= b)
				a = a % b;
			else
				b = b % a;
		}
		return a + b;
	}

	BufferedReader reader;
	StringTokenizer tokenizer;
	PrintWriter out;
	boolean isOuterFile = false;

	public void run() {
		try {
			if (isOuterFile) {
				reader = new BufferedReader(new FileReader(
						"C:\\work\\javaprojects\\CodeForces\\SCC.txt"));
				// out = new PrintWriter(new BufferedWriter(new FileWriter(
				// "output.txt")));
				// out = new PrintWriter(System.out);
			} else {
				reader = new BufferedReader(new InputStreamReader(System.in));
				out = new PrintWriter(System.out);
			}

			tokenizer = null;

			// long time = System.currentTimeMillis();
			solve();
			// out.println(System.currentTimeMillis() - time);
			reader.close();
			out.close();
		} catch (Exception e) {
			e.printStackTrace();
			System.exit(1);
		}
	}

	int nextInt() throws IOException {
		return Integer.parseInt(nextToken());
	}

	long nextLong() throws IOException {
		return Long.parseLong(nextToken());
	}

	double nextDouble() throws IOException {
		return Double.parseDouble(nextToken());
	}

	String nextToken() throws IOException {
		while (tokenizer == null || !tokenizer.hasMoreTokens()) {
			tokenizer = new StringTokenizer(reader.readLine());
		}
		return tokenizer.nextToken();
	}
	
	String nextLine() throws IOException {
		return reader.readLine();
	}
}