import java.util.*;
class sample{
    public static void main(String[] args){
        Scanner sc =new Scanner(System.in);
        String li = sc.nextLine();
        String sli = sc.nextLine();
        String[] dli = li.split(" ");
        String[] dsli = sli.split(" ");
        try{ArrayList<Integer> list = new ArrayList<>();
        for(int i=0;i<dli.length;i++){
            list.add(Integer.parseInt(dli[i]));
        }
        ArrayList<Integer> sublist = new ArrayList<>();
        for(int i=0;i<dsli.length;i++){
            sublist.add(Integer.parseInt(dsli[i]));
        }
        LinkedHashSet<Integer> che  = new LinkedHashSet(list);
        LinkedHashSet<Integer> check  = new LinkedHashSet(sublist);
        if(check!=sublist||che!=list){
            System.out.print("-1");
            return;
        }
        int index = Collections.indexOfSubList(sublist,list);
       if (index == -1) {
                System.out.println("Sublist not found");
            } else {
                System.out.println("Sublist found");
            }}
        catch(Exception e){
            System.out.print("Invalid input");
        }
    }
}