import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;

public class AuntUncle {
    public String[] list(String[] parents, String target) {
        String targetFather = null;
        String targetMother = null;
        HashSet<String> grandparents = new HashSet<String>();
        HashSet<String> parentSet = new HashSet<String>();
        List<String[]> splitParents = new ArrayList<String[]>();
        List<String> siblings = new ArrayList<String>();

        // for loop through the strings of parents to split them
        // into int arrays of [parent1, parent2, child]



        // for loop over the split families to look for the target's family
        // if you've found the target's family, save the parents of that family string array
        // as the targetFather and targetMother



        // for loop over the split families to find the families of targetFather/targetMother
        // if you find a family where the targetFather/Mother are the children
        // save those four parents as part of the grandparents set



        // for loop over the split families one last time
        // if you encounter a family where parent1 or parent2 is in the grandparents set
        // the child of that family must be a sibling of targetFather/Mother
        // but add an if condition to avoid counting targetFather/Mother as siblings of themselves



        // sort alphabetically



        // convert the ArrayList of sibling's you've been adding to an array to return
    }
}