Laravel 5 Generate ID and choose an random digit from the word with Value

Its possible with Laravel to make an Text field where i can choose an random digit from an before generated word and must enter to field, and if its true the site redirect.

Example:

I have an word saved in my DB like: stackoverflow

I visit my Page and get an Message like:

Choose the 3th Digit from your Word and enter it

Correct answer is in this step a. If i enter it in the text input field and Laravel check it if its correct and if its true i redirect to homepage.

Its also possible in Laravel to change always if i visit the page the Digit i must choose like: Choose 3th Digit,1th Digit,6th Digit

Many Thanks

via Chebli Mohamed