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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.util.*;

public class TandemRepeat
{
    public static void main(String[] args) 
    {
        // Set up scanner
        Scanner sc = new Scanner(System.in); 
        // System.out.println("Enter st");
        String st = sc.next();
        
        // System.out.println("Enter k");
        int k = sc.nextInt();
        
        if (k >= st.length())
        {
            System.out.println(st.length() * 2);
            return;
        }
        
        int maxlength = k * 2;
        
        for (int len=2; len< 2 * st.length(); len+=2)
        {
            for (int i=0; i<st.length(); i++)
            {
                if (i+len <= st.length())
                {
                    String check = st.substring(i, i+len);
                    // System.out.println("Checking string " + check);
                    if (check.substring(0, len/2).equals(check.substring(len/2)))
                    {
                        //System.out.println("Tandem repeat " + check + " found of length " + len);
                        if (len > maxlength)
                        {
                            maxlength = len;
                        }
                    }
                }
                else if (i + len/2 < st.length())
                {
                    String check = st.substring(i);
                    // System.out.println("Checking string " + check + " for a tandem repeat");
                    String left = check.substring(0, len/2);
                    String rest = check.substring(len/2);
                    if (left.indexOf(rest) == 0)
                    {
                        //System.out.println("A tandem repeat can be formed using " + left + " and adding to " + rest);
                        //System.out.println((left.length() - rest.length()) + " additional letters needed");
                        //System.out.println("The total length is " + left.length()*2);
                        if (left.length()*2 > maxlength && k >= (left.length() - rest.length()))
                        {
                            maxlength = left.length()*2;
                        }
                    }
                }
            }
        }
        if (maxlength == 0)
        {
            System.out.println(2);
        }
        else
        {
            System.out.println(maxlength);
        }
    }
}
                        
            