Expivi interview questions

I made a first videointerview with one of their head developers to talk about me, the company and the product. Very kind and honest person. Then we scheduled a task to get done in 5 hours. The task was to create a form using Laravel and Vue to upload images and generate all possible combinations of stacked layers using given images. Sadly I wasn't able to create in time the function that generates all combinations as they requested. All other requirements where fullfied but this.