import?java.io.*;
import?java.util.*;
public?class?Digital?{
	public?static?void?main(String[]?args){
		Random?a?=?new?Random();
		try{
			PrintWriter?pw?=?new?PrintWriter("E:digital.txt");
			for(int?i=0;i<50;i++){
				for(int?j=0;j<10;j++){
					pw.write(a.nextInt(51));
					pw.write("??");
				}
				pw.write("\r\n");
			}
			pw.close();
			System.out.println("perfect");
		}catch(Exception?ex){
			System.out.println("Exception");
		}
	}
}