import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String[] p = {"Never gonna give you up", "Never gonna let you down", "Never gonna run around and desert you", "Never gonna make you cry", "Never gonna say goodbye", "Never gonna tell a lie and hurt you", "Never gonna stop"};
int i, j;
int n = sc.nextInt();
String[] a = new String[n + 1];
String result = "Yes";
for(i = 0; i < a.length; i++) {
a[i] = sc.nextLine();
}
for(i = 1; i < a.length; i++) {
result = "Yes";
for(j = 0; j < p.length; j++) {
if(a[i].equals(p[j]) == true) {
result = "No";
break;
}
}
if(result.equals("Yes")) {
break;
}
}
System.out.println(result);
sc.close();
}
}