public static List<Integer> permutationEquation(List<Integer> p) {
        List<Integer> result = new ArrayList<>();
        
        for (int x = 1; x <= p.size(); x++) {
            int px = p.indexOf(x) + 1;
            int py = p.indexOf(px) + 1;
            
            result.add(py);
        }

        return result;
    }