#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < int(n); i++)
#define FOR(i,a,b) for(ll i = a; i < (ll)(b); i++)
#define all(a) (a).begin(),(a).end()
using ll = long long;
using VI = vector<int>;
using P = pair<int,int>;
const long long INF = 1LL << 60;
const int DX[] = {1,0,-1,0};
const int DY[] = {0,1,0,-1};

int main(){
	cin.tie(nullptr);
	ios_base::sync_with_stdio(false);
	
	int n;
	cin >> n;
	vector<string> s(n);
	rep(i,n) cin >> s[i];
	
	int cnt = 0;
	rep(i,n)rep(j,n){
		if(s[i][j] != s[i][n-1-j]) cnt++;
	}
	cnt /= 2;
	if(cnt%2 == 0) cout << "Yes" << endl;
	else cout << "No" << endl;
	return 0;
}