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("0", subStrHash("leetcode", 7, 20, 2, 0));
}
@Test
public void test2() {
    assertEquals("32", subStrHash("fbxzaad", 31, 100, 3, 32));
}

}