How to make a program for guessing the words of the gallows on the principle of one service in Node JS?

Question

Node.js

Good afternoon. On the Internet, I found a service - Hangman Assistant - https://sanstv.ru/viselica
This service has the ability to search for words by mask, exclude letters that do not contain a word and select the number of letters in a word. The Node JS program should have something like this functionality, but instead of cells on the site, it should be possible to set in the program console a mask of a word like a**b* and the number of letters, as well as the exclusion of letters. After entering these parameters in the console, the program should display the probability percentage of each letter in the word, as is done in the service.
How can I do that? If you look at the element code on this service, you can see the path to the ...nouns...js dictionary and insert scripts.