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import java.io.*;
import java.math.BigInteger;
import java.util.*;

public class Main {


    long MODULO = 998244353;
    class Pair implements Comparable<Pair>{
        long a, b;

        public Pair(long a, long b) {
            this.a = a;
            this.b = b;
        }

        @Override
        public int compareTo(Pair o) {
            return Long.compare(this.a, o.a);
        }
    }
    void solve() throws IOException {
        String s = readString();
        int k = readInt();
        for (int i=0; i<k; ++i) s += "*";
        char[] arr = s.toCharArray();

        int n = arr.length;
        int ans = 0;
        for (int i=0; i<n; ++i){
            for (int len=1; i+2*len-1<n; ++len){
                boolean flag = true;
                for (int j=0; j<len; ++j){
                    if (arr[i + j] != arr[i + len + j] && arr[i+len+j] != '*') flag = false;
                }
                if(flag)ans = Math.max(ans, len);
            }
        }
        out.println(ans * 2);
    }

    long gcd(long a, long b){
        return a % b == 0 ? b : gcd(b, a % b);
    }

    class PersistentTree {
        ArrayList<Node> steps;
        int n;
        PersistentTree(int n) {
            this.n = n;
            steps = new ArrayList<>();
            Node root = build(1, n);
            steps.add(root);
        }

        Node build(int l, int r){
            if (l == r) {
                return new Node(0);
            }
            int mid = (l + r) / 2;
            Node left = build(l, mid);
            Node right = build(mid + 1, r);
            return new Node(left, right, 0);
        }

        void update(int target){
            Node prevRoot = steps.get(steps.size() - 1);
            Node newRoot = add(prevRoot, new Node(0), 1, n, target);
            steps.add(newRoot);
        }

        Node add(Node prevNode, Node curNode, int l, int r, int target){
            if (l == r) {
                return new Node(prevNode.sum + 1);
            }
            int mid = (l + r) / 2;
            if (target <= mid){
                curNode.right = prevNode.right;
                curNode.left = add(prevNode.left, new Node(0), l, mid, target);
            } else {
                curNode.left = prevNode.left;
                curNode.right = add(prevNode.right, new Node(0), mid + 1, r, target);
            }
            curNode.sum = curNode.right.sum + curNode.left.sum;
            return curNode;
        }

        int getAnswer(int step, int leftBorder, int rightBorder){
            Node root = steps.get(step);
          //  out.println(step + " " + leftBorder + " "+ rightBorder + " " + getAnswerForRoot(root, 1, n, leftBorder, rightBorder));
            return getAnswerForRoot(root, 1, n, leftBorder, rightBorder);
        }

        int getAnswerForRoot(Node root, int l, int r, int leftBorder, int rightBorder){
            if (leftBorder > rightBorder) return 0;
            if (l == leftBorder && r == rightBorder) return root.sum;
            int mid = (r + l) / 2;
            int leftSum = getAnswerForRoot(root.left, l, mid, leftBorder, Math.min(rightBorder, mid));
            int rightSum = getAnswerForRoot(root.right, mid + 1, r, Math.max(leftBorder, mid + 1), rightBorder);
            return leftSum + rightSum;
        }
    }


    class Node {
        Node left, right;
        int sum;
        Node(int sum){
            this.sum = sum;
        }
        Node (Node left, Node right, int sum){
            this.left = left;
            this.right = right;
            this.sum = sum;
        }
    }
    int[][] steps = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};
    String fileName = "";
    int INF = Integer.MAX_VALUE / 2;
    private final static Random rnd = new Random();

    long binPow(long a, long b, long m) {
        if (b == 0) {
            return 1;
        }
        if (b % 2 == 1) {
            return ((a % m) * (binPow(a, b - 1, m) % m)) % m;
        } else {
            long c = binPow(a, b / 2, m);
            return (c * c) % m;
        }

    }
    boolean checkBit(long mask, int bit) {
        return (mask & (1l << bit)) > 0;
    }

    ////////////////////////////////////////////////////////////
    public static void main(String[] args) throws NumberFormatException, IOException {
        // TODO Auto-generated method stub
        new Main().run();
    }

    void run() throws NumberFormatException, IOException {
        solve();
        out.close();
    }

    ;

    BufferedReader in;
    PrintWriter out;

    StringTokenizer tok;
    String delim = " ";

    Main() throws FileNotFoundException {
        try {
            in = new BufferedReader(new FileReader("input.txt"));
            out = new PrintWriter("output.txt");
        } catch (Exception e) {
            if (fileName.isEmpty()) {
                in = new BufferedReader(new InputStreamReader(System.in));
                out = new PrintWriter(System.out);
            } else {
                in = new BufferedReader(new FileReader(fileName + ".in"));
                out = new PrintWriter(fileName + ".out");
            }

        }
        tok = new StringTokenizer("");
    }

    String readLine() throws IOException {
        return in.readLine();
    }

    String readString() throws IOException {
        while (!tok.hasMoreTokens()) {
            String nextLine = readLine();
            if (null == nextLine) {
                return null;
            }

            tok = new StringTokenizer(nextLine);
        }
        return tok.nextToken(delim);
    }

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

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

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

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