public class d8 {
public static void paperzhe(int N){
process(1,N,true);
}
public static void process(int i,int N,boolean f){
if(i>N){return;}
process(i+1,N,true);
System.out.println(f==true?"凹":"凸");
process(i+1,N,false);
}
public static void main(String[]args){
paperzhe(3);
}
}