1408. String Matching in an Array

class Solution 
{
    public static boolean func(String[] words, String curr, int index)  // index here is the index to be excluded
    {
        for(int i = 0; i < words.length; i++) 
        {
            if(i == index) continue;

            String other = words[i];
            if (other.contains(curr)) 
            {
                return true;
            }
        }

        return false;
    }

    public List<String> stringMatching(String[] words) 
    {

        ArrayList<String> result = new ArrayList<>();

        for(int i = 0; i < words.length; i++) 
        {
            String curr = words[i];

            if(func(words, curr, i)) 
            {
                result.add(curr);
            } 
        }

        return result;




        /* RUNTIME 4 MS , MEMORY 42.65 MB

        ArrayList<String> result = new ArrayList<>();

        for(String a : words)
        {
            for(String b : words)
            {
                if(a.length() < b.length() && b.indexOf(a) != -1) 
                {
                    result.add(a);
                    break;
                }

            }

        }
        
        return result;

        */

        
    }
}