import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Test;
import java.util.List;
import java.util.Arrays;
import java.util.ArrayList;
public class Main {
    //Program start
    
    //Program end

    @Test
public void test1() {
    assertEquals(new ArrayList<>(Arrays.asList(new ArrayList<>(Arrays.asList(9,9)),new ArrayList<>(Arrays.asList(8,6)))), largestLocal(new ArrayList<>(Arrays.asList(new ArrayList<>(Arrays.asList(9,9,8,1)),new ArrayList<>(Arrays.asList(5,6,2,6)),new ArrayList<>(Arrays.asList(8,2,6,4)),new ArrayList<>(Arrays.asList(6,2,2,2))))));
}
@Test
public void test2() {
    assertEquals(new ArrayList<>(Arrays.asList(new ArrayList<>(Arrays.asList(2,2,2)),new ArrayList<>(Arrays.asList(2,2,2)),new ArrayList<>(Arrays.asList(2,2,2)))), largestLocal(new ArrayList<>(Arrays.asList(new ArrayList<>(Arrays.asList(1,1,1,1,1)),new ArrayList<>(Arrays.asList(1,1,1,1,1)),new ArrayList<>(Arrays.asList(1,1,2,1,1)),new ArrayList<>(Arrays.asList(1,1,1,1,1)),new ArrayList<>(Arrays.asList(1,1,1,1,1))))));
}

}