#include<bits/stdc++.h>
using namespace std;
using ll=long long;


int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
	
	ll N;
	cin>>N;
	
	vector<string> S(N);
	ll cnt=0;
	for(int i=0;i<N;i++){
		cin>>S[i]; 
		for(int j=0;j*2<N;j++)if(S[i][j]!=S[i][N-j-1])cnt++;
	}
	cout<<(cnt%2==0?"Yes":"No")<<endl;
}