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32
 kbxuunznjtxutlauuuipifggjjkequbpvbagmxojhgxtakxioxsmrmoatlyzwsygibhafspqnfbycyztxmtpirqcyhalluhhubne
100
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3
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123
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41
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15
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2
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141
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140
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10
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133
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43
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5
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132
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33
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32
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41
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150
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200
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15
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41
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115
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3
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57
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23
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57
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32
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200
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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.*;


public class Problem442B {
    public static void main(String[] args) throws IOException {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        String s = in.readLine();
        char[] arrayRep = s.toCharArray();
        int numberAdd = Integer.parseInt(in.readLine());
        int bestAnswer = 0;
        if (arrayRep.length < numberAdd) {
            int total = arrayRep.length + numberAdd;
            total /= 2;
            total *= 2;
            bestAnswer = Math.max(bestAnswer, total);
        }

        for (int i = 0; i < arrayRep.length; i++) {
            here:
            for (int j = (arrayRep.length - (2 * i)); (arrayRep.length - i) - j <= (numberAdd + i); j--) {
                if (j < 0) {
                    break;
                }
                int lengthOfRepeat = ((arrayRep.length - i - 1) - j) + 1;
                int possibleLength = lengthOfRepeat * 2;
                for (int k = j; (k - j) < lengthOfRepeat && k + lengthOfRepeat < arrayRep.length; k++) {
                    if (arrayRep[k] != arrayRep[k + lengthOfRepeat]) {
                        continue here;
                    }
                }
                bestAnswer = Math.max(bestAnswer, possibleLength);
            }
        }

        for (int i = 1; i < arrayRep.length; i++) {
            here2:
            for (int j = 0; j < arrayRep.length - (2 * i); j++) {
                if (arrayRep[j] != arrayRep[j + i]) {
                    continue here2;
                }
                bestAnswer = Math.max(bestAnswer, i * 2);
            }
        }
        System.out.println(bestAnswer);
        System.exit(0);
    }
}
