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100
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3
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2
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141
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5
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33
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150
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3
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10
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1
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23

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 java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.util.StringTokenizer;
 
public class KolyaAndTandemRepeat {
    public static void main(String[] args) {
        MyScanner sc = new MyScanner();
        
        String str = sc.nextLine();
        int K = sc.nextInt();
        
        for (int i = 0; i < K; i++) {
        	str += "*";
        }
        
        int maxTandem = 0;
        for (int i = 0; i < str.length(); i++) {
        	for (int n = 1; n < str.length(); n++) {
        		if (isTandem(str, i, n)) {
        			maxTandem = Math.max(maxTandem, n);
        		}
        	}
        }
        
        System.out.println(2 * maxTandem);
    }
    
    public static boolean isTandem(String str, int start, int N) {
    	for (int i = 0; i < N; i++) {
    		if (start + i + N >= str.length()) {
    			return false;
    		}
    		char curr = str.charAt(start + i);
    		char next = str.charAt(start + i + N);
    		if (next != '*' && curr != next) {
    			return false;
    		}
    	}
    	return true;
    }
 
    public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;
 
        public MyScanner() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }
 
        int nextInt() {
            return Integer.parseInt(next());
        }
 
        long nextLong() {
            return Long.parseLong(next());
        }
 
        double nextDouble() {
            return Double.parseDouble(next());
        }
 
        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }
 
        String nextLine() {
            String str = "";
            try { str = br.readLine(); }
            catch (IOException e) { e.printStackTrace(); }
            return str;
        }
    }
}