Crash when no input words are longer than 2 characters

[nai888]

Describe the issue
If the input text contains only 1- or 2-character words, with nothing longer, the tool crashes when you click Generate.

To Reproduce
Steps to reproduce the behavior:

1. Enter a series of words that are no longer than 2 characters
2. Click Generate
3. Page becomes a blank white screen

Expected behavior
It should be able to create new two-character word combinations. Alternatively, it should have error handling and display an error.