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64
 200
 6
 246
 220
 108
 6
 334
 280
 20
 266
 60
 10
 142
 58
 120
 134
 172
 400
 186
 60
 230
 8
 190
 46
 74
 54
 400
 12
 2
 86



import static java.util.Arrays.*;
import static java.lang.Math.*;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.StringTokenizer;
 
public class B {
    private static final boolean isDebug = false;

    void solve() throws Throwable {
        startTime = System.currentTimeMillis();
        
        
        char[] c = br.readLine().toCharArray();
        
        int K = readInt();

        int N = c.length;
        
        int max = 0;
        for (int i = 0; i < N; i++) {
            next : for (int j = 2; i + j <= N + K; j+=2) {
                boolean isFalse = false;
                for (int k = 0; k < j / 2; k++) {
//                    System.out.println(j + " " + k);
                    if (i + j / 2 + k < N) {
//                        System.out.println(c[i + k] != c[i + j / 2 + k ]);
                        if (c[i + k] != c[i + j / 2 + k ]) {
                            isFalse = true;
                            break ;
                        }
                    }
                }
                if (!isFalse) {
                    max = max(max, j);
                }
            }
        }
        
        pw.println(max);
    }    

    
    private static long gcd(long n1, long n2) {
        return (n2 == 0)?n1:gcd(n2, n1%n2);
    }

    private static int gcd(int n1, int n2) {
        return (n2 == 0)?n1:gcd(n2, n1%n2);
    }
    private int brPos = 0;
    private int[] brBuf = null;
    
    private final int readBufInt() throws IOException {
        if (brBuf == null || brBuf.length == brPos) {
            brBuf = readIntArray();
            brPos = 0;
            return readBufInt();
        }
        return brBuf[brPos++];
    }

    private final int readInt() throws IOException {
        return Integer.parseInt(br.readLine());
    }

    private final long readLong() throws IOException {
        return Long.parseLong(br.readLine());
    }

    private final int[] readIntArray() throws IOException {
        String[] s = readStrArray();
        int cnt = s.length;
        int[] out = new int[cnt];
        for (int i = 0; i < cnt; i++) out[i] = Integer.parseInt(s[i]);
        return out;
    }

    private final char[] readCharArray() throws IOException {
        String[] s = readStrArray();
        int cnt = s.length;
        char[] out = new char[cnt];
        for (int i = 0; i < cnt; i++) out[i] = s[i].charAt(0);
        return out;
    }

    private final long[] readLongArray() throws IOException {
        String[] s = readStrArray();
        int cnt = s.length;
        long[] out = new long[cnt];
        for (int i = 0; i < cnt; i++) out[i] = Long.parseLong(s[i]);
        return out;
    }

    private final String[] readStrArray() throws IOException {
//      String[] s = br.readLine().split(" ");
      List<String> res = new ArrayList<String>();
      StringTokenizer st = new StringTokenizer(br.readLine(), " ");
      while (st.hasMoreTokens()) {
          res.add(st.nextToken());
      }
      
      return res.toArray(new String[0]);
  }
    static long startTime;
    public static void main(String[] args) {
        B app = new B();
        try {
            app.br = new BufferedReader(new InputStreamReader(System.in));
            app.solve();
        } catch(Throwable e) {
            e.printStackTrace();
        } finally {
            try { app.br.close();} catch (Exception igunore) {}
        }
        d(System.currentTimeMillis() - startTime + " ms");
        pw.flush();
        pw.close();
    }

   static final void d(Object ... o) {
       if (isDebug) pw.println(deepToString(o));
   }

   static final void d(boolean[][] oA) {
       for (boolean[] o : oA) {
           d(o);
       }
   }

   BufferedReader br = null;
   static PrintWriter pw = new PrintWriter(System.out);
   

}
