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 280
 20
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import java.util.*;
// import java.lang.*;
import java.io.*;

//           THIS TEMPLATE MADE BY AKSH BANSAL.

public class Solution {
    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }
    }

    public static void main(String[] args) throws IOException {
        FastReader sc = new FastReader();
        PrintWriter out = new PrintWriter(System.out);
        // ________________________________

        // int t = sc.nextInt();
        // StringBuilder output = new StringBuilder();

        // while (t-- > 0) {
        //     output.append(solver(s,k)).append("\n");
        // }

        // out.println(output);
        // _______________________________

        String s= sc.nextLine();
        int k = sc.nextInt();
        out.println(solver(s,k));
        // ________________________________
        out.flush();
    }

    public static int solver(String s, int k) {
        int len = s.length();
        int odd = (len+k)%2==0?0:1;
        if(k>=len)return (len+k-odd);
        int sec = (k+len)/2+odd;
        int first=odd;
        int res = (len+k)-odd;
        while(sec<len){
            // System.out.println(s.substring(first,first+len-sec)+"__"+s.substring(sec,len)+"__"+res);
            if(s.substring(first,first+len-sec).equals(s.substring(sec,len))){
                return res; 
            }else{
                first+=2;
                sec++;
                res-=2;
            }
        }
        return res;
    }
}