#include <iostream>
#include <cstdint>
#include <vector>

using namespace std;

static inline constexpr const char* solve(const uint32_t N, const vector<string>& A)
{
	uint32_t count = 0;
	for (uint32_t i = 0; i != N; ++i)
		for (uint32_t j = 0; j != N / 2; ++j)
			if (A[i][j] != A[i][(N - 1) - j])
				++count;

	if ((count & 1) && !(N & 1)) return "No";
	else return "Yes";
}

int main()
{
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	
	uint32_t N, i;
	cin >> N;
	vector<string> A(N);
	for (i = 0; i != N; ++i)
	{
		A[i].reserve(N);
		cin >> A[i];
	}

	cout << solve(N, A) << '\n';
	return 0;
}