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 6
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 108
 6
 334
 280
 20
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 60
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#include <bits/stdc++.h>
using namespace std;
template <typename T>
std::ostream &operator<<(std::ostream &out, vector<T> &v) {
  for (typename vector<T>::size_type i = 0; i < v.size(); ++i)
    out << v[i] << " ";
  out << "\n";
  return out;
}
template <typename T>
std::ostream &operator<<(std::ostream &out, set<T> &s) {
  for (auto e : s) out << e << " ";
  out << "\n";
  return out;
}
template <typename T, typename N>
std::ostream &operator<<(std::ostream &out, pair<T, N> &p) {
  out << "(" << p.first << ", " << p.second << ") ";
  return out;
}
template <typename T, typename N>
std::ostream &operator<<(std::ostream &out, vector<pair<T, N> > &v) {
  for (size_t i = 0; i < v.size(); ++i) cout << v[i];
  out << "\n";
  return out;
}
template <typename T>
std::ostream &operator<<(std::ostream &out, vector<vector<T> > &v) {
  for (size_t i = 0; i < v.size(); ++i) {
    for (size_t j = 0; j < v[i].size(); ++j) {
      out << v[i][j] << " ";
    }
    out << "\n";
  }
  return out;
}
template <typename T>
std::ostream &operator<<(std::ostream &out, vector<set<T> > &v) {
  for (size_t i = 0; i < v.size(); ++i) {
    out << v[i];
  }
  out << "\n";
  return out;
}
void solve() {
  string s;
  cin >> s;
  int k;
  cin >> k;
  int n = s.size();
  int longest = 2 * min(n, k);
  if (k > n) {
    longest = max(longest, (k + n) / 2 * 2);
  }
  for (int i = 0; i < n; ++i) {
    for (int j = i + 1; j < n; ++j) {
      if (s[j] == s[i]) {
        int m = i + 1, l = j + 1;
        bool valid = true;
        for (; m < j && l < n; ++m, ++l) {
          if (s[m] != s[l]) {
            valid = false;
            break;
          }
        }
        if (valid) {
          if (l == n) {
            if (k >= j - m) {
              longest = max(longest, 2 * (j - i));
            }
          } else {
            longest = max(longest, 2 * (j - i));
          }
        }
      }
    }
  }
  cout << longest << "\n";
  return;
}
int main() {
  std::ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int t;
  t = 1;
  while (t--) {
    solve();
  }
  return 0;
}
