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import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.StringTokenizer;
import java.util.TreeSet;

public class solver implements Runnable {
    BufferedReader in;
    PrintWriter out;
    StringTokenizer tok = new StringTokenizer("");

    // final boolean OJ = System.getProperty("ONLINE_JUDGE") != null;

    void init() throws FileNotFoundException {

        in = new BufferedReader(new InputStreamReader(System.in));
        out = new PrintWriter(System.out);

        // try {
        // in = new BufferedReader(new FileReader("input.txt"));
        // out = new PrintWriter("output.txt");
        // } catch (Throwable e) {
        // in = new BufferedReader(new InputStreamReader(System.in));
        // out = new PrintWriter(System.out);
        // }
    }

    String readString() throws IOException {
        while (!tok.hasMoreTokens()) {
            try {
                tok = new StringTokenizer(in.readLine());
            } catch (Exception e) {
                return null;
            }
        }
        return tok.nextToken();
    }

    int readInt() throws IOException {
        return Integer.parseInt(readString());
    }

    long readLong() throws IOException {
        return Long.parseLong(readString());
    }

    double readDouble() throws IOException {
        return Double.parseDouble(readString());
    }

    public static void main(String[] args) {
        new Thread(null, new solver(), "", 128 * (1L << 20)).start();
    }

    public void run() {
        try {
            init();
            long time = System.currentTimeMillis();
            solve();
            System.err.println(System.currentTimeMillis() - time);
            out.close();
        } catch (IOException e) {
            System.err.println(e.getMessage());
            System.exit(-1);
        }
    }

    int gcd(int a, int b) {
        if (b == 0)
            return a;
        return gcd(b, a % b);
    }

    class Pair implements Comparable<Pair> {
        int x;
        int y;

        Pair(int x, int y) {
            this.x = x;
            this.y = y;
        }

        @Override
        public int compareTo(Pair o) {
            // if (x != o.x)
            // return x - o.x;
            return y - o.y;
        }
    }

    int[] iMasWithSort(int n) throws IOException {
        Integer[] a = new Integer[n];
        for (int i = 0; i < n; i++) {
            a[i] = readInt();
        }
        Arrays.sort(a);
        int[] sorted = new int[n];
        for (int i = 0; i < n; i++) {
            sorted[i] = a[i];
        }
        return sorted;
    }

    int[] iMas(int n) throws IOException {
        int[] a = new int[n];
        for (int i = 0; i < n; i++) {
            a[i] = readInt();
        }
        return a;
    }

    int calc(char[][] a, char[][] b) {
        int answer = 0;
        int n = a.length;
        int m = a[0].length;
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < m; j++) {
                if (a[i][j] == b[i][j])
                    answer++;
            }
        }
        return answer;
    }
    
    int kol(char[] a, int start){
        int res = 0;
        int n=a.length;
        for (int len=1;len<a.length;len++){
            boolean p=true;
            for (int i=start;i<start+len;i++){
                if (i+len>=n) {
                    p=false;
                    break;
                }
                if (a[i+len]=='$') continue;
                if (a[i]!=a[i+len]) {
                    p=false;
                    break;
                }
            }
        if (p) res=Math.max(res, len);
        }
        return res;
    }

    void solve() throws IOException {
        char[] s = readString().toCharArray();
        char[] a = new char[s.length + readInt()];
        int n = a.length;
        for (int i = 0; i < s.length; i++) {
            a[i] = s[i];
        }
        for (int i=s.length;i<n;i++) a[i]='$';
        int ans=0;
        for (int i=0;i<n;i++){
            ans = Math.max(ans, kol(a,i));
        }
        out.println(2*ans);
        
    }
}