package main

import . "fmt"

func main() {
	var n int
	Scan(&n)
	if n%2==1 {
		Println("Yes")
		return
	}
	c:=0
	for i:=0;i<n;i++ {
		var s string
		Scan(&s)
		for j:=0;j<n/2;j++ {
			if s[j]!=s[n-j-1] {
				c++
			}
		}
	}
	if c%2==0 {
		Println("Yes")
	} else {
		Println("No")
	}
}