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 86

#include <algorithm>
#include <array>
#include <bitset>
#include <cctype>
#include <chrono>
#include <cmath>
#include <ctime>
#include <deque>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iso646.h>
#include <iterator>
#include <list>
#include <map>
#include <memory>
#include <numeric>
/*                           mnciitbhu                        */
//
//  |\    /| |\    |    --  |  |  -------  |⎻⎻\   |   |  |    |
//  | \  / | | \   |   /    |  |     |     |   |  |   |  |    |
//  |  \/  | |  \  |  (     |  |     |     |--<   |---|  |    |
//  |      | |   \ |   \    |  |     |     |   |  |   |   \  /
//  |      | |    \|    --  |  |     |     |__/   |   |    --
//
#include <queue>
#include <ratio>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <valarray>
#include <vector>
using namespace std;
using namespace std::chrono;
using ll = long long;
using ld = long double;
#if not defined(ONLINE_JUDGE) && not defined(_MSVC_LANG) && defined(DEBUG_)
#include "myconfig.hpp"
#else
#define LOL(x) ;
#define LOLX(...) ;
#endif
int main()
{
	cout << boolalpha;
	ios::sync_with_stdio(false);
	cin.tie(0);
		
	string s;
	cin >> s;
	ll k, ans = 0;
	cin >> k;

	for(int i = 0; i < k; ++i)
		s.push_back('.');
	LOL(s);
	for(size_t i = 0; i < s.size(); ++i)
	{
		for(size_t j = 2; (i + j) <= s.size(); j += 2)
		{
			size_t mid = j / 2;
			bool rep = true;
			for(size_t k = 0; k < mid; ++k)
			{
				if(s[i + k] == s[i + mid + k] or s[i + mid + k] == '.')
					continue;
				else
				{
					rep = false;
					break;
				}
			}
			if(rep)
			{
				ans = max(ans, (ll)j);
			}
			LOLX(i, j, rep, ans);
		}
	}
	cout << ans;

	return 0;
}
