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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 java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Map.Entry;
import java.util.Queue;
import java.util.Scanner;
import java.util.Set;
import java.util.Stack;
import java.util.StringTokenizer;
import java.util.TreeMap;
import java.util.Vector;
 
 
public class Main {
	public static void main(String[] args) throws IOException{
		  	FastScanner sc = new FastScanner();
			PrintWriter out = new PrintWriter(System.out);
			String str =sc.nextToken();
			int k =sc.nextInt();
			if(k>=str.length()){
				System.out.println(k+str.length());
				return;
			}
			char a[]= new char[str.length()+k];
			int i ;
			for( i=0;i<str.length();i++){
				a[i]=str.charAt(i);
			}
			for(;i<str.length()+k;i++)
				a[i]='X';
			int max =-1;
			char t []= {'l','i'};
			//System.out.println(valid(t,0,1));
			for( i =0 ;i<a.length;i++){
				for(int j=i;j<a.length;j++){
					if((j-i+1)%2==1)continue;
					if(valid(a,i,j)){
						//System.out.println(i+" "+j);
						max=Math.max(max, j-i+1);
					}
				}
			}
			System.out.println(max);
			

			
			
		
	}
	public static boolean valid( char [] a , int i ,int j){
		if((j-i+1)%2==1)return false;
		int n = (j-i+1)>>1;
		for(int l=1;l<=n;l++){
			if(a[i]!=a[i+n] && a[i+n]!='X')
				return false;
		}
		return true;
	}

		
	
			
		
	

			

			
			
			
	
	



	
	
			    
			


			
			
	
	
	

			
	
		
	
	
	
		

			

		

	
	

	
	
	

			
						
			

	
	

		
		
		





















































	static void generate(int[] p, int L, int R) {
		  if (L == R) {
		      
		      
		  }else { 
		    for (int i = L; i <= R; i++) {
		    	int tmp = p[L]; p[L] = p[i]; p[i] = tmp;//swap
		      generate(p, L+1, R);//recurse 
		      tmp = p[L]; p[L] = p[i]; p[i] = tmp;//unswap

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


	
	
	
	











	
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
class FastScanner {
 
 
 
 
    BufferedReader br;
    StringTokenizer st;
 
    public FastScanner() {
        br = new BufferedReader(new InputStreamReader(System.in));
    }
 
    public FastScanner(String s) {
        try {
            br = new BufferedReader(new FileReader(s));
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
 
    String nextToken() {
        while (st == null || !st.hasMoreElements()) {
            try {
 
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return st.nextToken();
    }
 
    int nextInt() {
        return Integer.parseInt(nextToken());
    }
 
    long nextLong() {
        return Long.parseLong(nextToken());
    }
 
    double nextDouble() {
        return Double.parseDouble(nextToken());
    }
 
 
}