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

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Stack;
import java.util.StringTokenizer;
import java.util.TreeSet;



public class Main {
	
	/**
	 * @param args
	*/
	 BufferedReader in;
	    PrintWriter out = new PrintWriter(System.out);
	    StringTokenizer tok;
	   
	     String readToken() throws IOException { // reads the token; to read a full line use in.readLine()
	    while (tok == null || !tok.hasMoreTokens()) {
	    tok = new StringTokenizer(in.readLine());
	    	
	    }
	    return tok.nextToken(); // sometimes it's better to use nextToken(String) method here
	    }
	     int readInt() throws IOException { // write readDouble(), readLong(), readBigInteger() methods if necessary
	    return Integer.parseInt(readToken());
	    }
	     public String readLine() throws IOException{
			return in.readLine();
	    	 
	     }
	     long readLong() throws IOException { // write readDouble(), readLong(), readBigInteger() methods if necessary
	    	    return Long.parseLong(readToken());
	    	    }
	     double readDouble() throws IOException { // write readDouble(), readLong(), readBigInteger() methods if necessary
	    	    return Double.parseDouble(readToken());
	    	    }
	    public static void main(String[] args) throws IOException
	    {
	       new Main().run();
	    }
	    void run() throws IOException
	    {
	    	
	    	out = new PrintWriter(new OutputStreamWriter(System.out));
	    	in = new BufferedReader(new InputStreamReader(System.in));
	    	
	       solve();
	       out.flush();
	       tok=null;
	    }
	  
	  
	    void solve() throws IOException{
	    	String ln=readLine();
	    	int k=readInt();
	    	int  n=ln.length();
	    	if (n<=k){
	    	if (n==k){
	    		out.println(2*n);
	    	}else if (n==k-1){
	    		out.println(2*n);
	    	}else{
	    		int ans=(n+(k-n)/2)*2;
	    		out.println(ans);
	    	}
	    	}else{
	    		int ans=2*k;
	    		int d=k;
	    		int ans1=ans;
	    		int b=n-1;
	    		int c=n-1-k;
	    		while (ln.charAt(b)==ln.charAt(c)){
	    			d++;
	    			if (d%2==0)
	    			ans1+=2;
	    			c--;
	    			if (c==-1) break;
	    			
	    		}
	    		
	    	out.println(Math.max(ans1,ans));
	    	}
	    	
	    }
}