- underscore-string-underscore combinations (```_us_```) are transformed into requiered html text input field with string between underscores as a value of ```data-expected``` atribute (```<inputtype="text"data-expected="us">```).
To run the app on your own machine run ```pipenv install``` to install requested packages based on the Pipfile and then run ```pipenv shell 'gunicorn --bind 0.0.0.0:5000 app:app'``` or ```flask run```.