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 20
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 86

#include <bits/stdc++.h>
using namespace std;
const int inf = 2e8 + 5;
const long long l_inf = 9e18 + 5;
template <typename T, typename T2>
ostream &operator<<(ostream &s, const pair<T, T2> &p) {
  return s << p.first << ' ' << p.second << ' ';
}
template <typename T, typename T2>
istream &operator>>(istream &s, pair<T, T2> &p) {
  return s >> p.first >> p.second;
}
template <typename T>
ostream &operator<<(ostream &s, const vector<T> &v) {
  for (auto it : v) s << it << ' ';
  return s;
}
template <typename T>
istream &operator>>(istream &s, vector<T> &v) {
  for (auto it = (v).begin(), it_ = (v).end(); it != it_; it++) s >> *it;
  return s;
}
template <typename T>
void read_range(T beg, T end) {
  while (beg != end) cin >> *beg++;
}
template <typename T>
void print_range(T beg, T end) {
  while (beg != end) cout << *beg++ << ' ';
}
struct reader {
  template <typename T>
  reader &operator,(T &v) {
    cin >> v;
    return *this;
  }
} rdr;
struct debugger {
  template <typename T>
  debugger &operator,(const T &v) {
    cerr << v << ", ";
    return *this;
  }
} dbg;
int main() {
  ios_base::sync_with_stdio(false);
  string s;
  rdr, s;
  ;
  int new_c;
  rdr, new_c;
  ;
  for (int i = 0; i < new_c; i++) {
    s.push_back('?');
  }
  int new_sz = s.size();
  int max_len = -1;
  for (int i = 0; i < new_sz - 1; i++) {
    int r_limit = min(i + 1, new_sz - i - 1);
    for (int j = 1; j <= r_limit; j++) {
      bool repeat = true;
      for (int k = 0; k < j; k++)
        if (!(s[i - k] == '?' or s[i + j - k] == '?' or
              s[i - k] == s[i + j - k]))
          repeat = false;
      if (repeat) max_len = max(max_len, j * 2);
    }
  }
  cout << max_len;
  return 0;
}
