#include <bits/stdc++.h>
#include <atcoder/all>

using namespace std;
using namespace atcoder;
using ll = long long;
using mint = modint998244353;

#define rep(i, n) for (int i = 0; i < (n); ++i)

int main() {

  int n; cin >> n;
  vector<string> s(n);
  rep(i,n) cin >> s[i];

  int cnt = 0;

  int N = n/2;

  rep(i,n)rep(j,N){
    if (s[i][j] != s[i][n-1-j]){
      // cout << i << " " << j << endl;
      cnt++;
    }
  }
  cout << (cnt%2==0 ? "Yes" : "No") << endl;

  return 0;
}