public class Mylist{
	String [] list;
	public Mylist(){
		String []list;
	}
	public Mylist(String s){
		list=new String[1];
		list[0]=s;
	}
	public Mylist(String []s){
	    list=s;
	}
	public int Length(){
		return list.length;
	}
	public String First(){
		return this.list[0];
	}
	public String[] Rest(){
		list[0]="";
		return list;
	}
	public void Insert(String n, int j){
		list[j]=n;
	}
	public void Delete(String e){
		for(int k=0;k<list.length;k++){
			if(list[k]==e){
				list[k]="";
			}
		}
	}
	public boolean isEmpty(){
		if(list != null){
			return false;
		}
		else return true;
	}
	public boolean subList(String[]f){
		int l=0;
		int m=0;
		while (m<list.length && l<f.length){
			if(f[l].equals(list[m])){
				l++;
			}
			m++;
		}
		if(l==f.length){
			return true;
		}
		else return false;
	}
//now for testing the code
	public static void main (String[] args) {
		Mylist l1=new Mylist();
		Mylist l2=new Mylist("Ali");
		String [] trail={"ali","ahmad","mohamed","mostafa","ali","hetham","said","ali"};
		Mylist l3=new Mylist(trail);
		System.out.println("the length of trail is "+l3.Length());
		System.out.println("the first name in trail is "+l3.First());
		System.out.print("while the rest are " );
		String[]reast=l3.Rest();
		for(int x=0;x<reast.length;x++){
			System.out.print(reast[x]+ " ");
		}
		System.out.println("the first and only name in list 2 is "+ l2.First());
		l2.Insert("shafee2 :)",0);
		System.out.println("which after changing became "+l2.First());
		l3.Delete("ali");
		System.out.print("list 3 after purifying it from ali is "+l3.First());
		String[]loot=l3.Rest();
		for(int y=0;y<loot.length;y++){
			System.out.print(loot[y]+ " ");
		}
		System.out.println("whoever said list 1 is empty was "+l1.isEmpty());
		String []finale={"ahmad","mohamed","said"};
		System.out.println("the final question is if given list is substring of L3, the answer is " +l3.subList(finale));
    }
    //done...
}