Nihilist, Cryptarithm and Aristocrat keyword are too tall

[John Toebes]

As a result it often only puts one of them on a page.

What needs to be done:

1. Removing the blank line after the "Enter the Keyword here"
2. Reduce the padding of the nihilist table from .5rem to .4rem
3. Move the Cryptarithm table to the right of the solution box