import java.util.*;
import java.lang.*;
 
class Test {
    public static void main (String [] args) {
        List<List<String>> list = new ArrayList<>();
        list.add(new ArrayList<>());
        list.get(0).add("wlasnie ");
        list.get(0).add("tak ");
 
        list.add(new ArrayList<>());
        list.get(1).add("dodac ");
        list.get(1).add("mozna ");
        list.get(1).add("do takiej listy");
 
        for (List<String> wewnetrzna_lista : list) {
            for (String string : wewnetrzna_lista)
                System.out.println(string);
        }
    }
}
 

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