import java.util.*;

public class Main{
	public static void main(String[] args){
		int n = new Scanner(System.in).nextInt();
		int nyanCount = 0;
		int humanNumber = -1;
		String[][] greet = new String[n][n];
		for(int i = 0; i <= n-1;i++){
			for(int j = 0; j <= n-1;j++){
				greet[i][j] = new Scanner(System.in).nextLine();
				if("nyanpass".equals(greet[i][j])){
					nyanCount = 1;
					humanNumber = j;
					break;
				} 
			}
			if(nyanCount == 1){ break; }
		}
		System.out.println(humanNumber++);
	}
}