```ruby
require './calendar'

Mortalical::Calendar.generate(1995, !ARGV.include?("--letter"), !ARGV.include?("--nofill"))```

Add command line argument for year
user
```ruby
require './calendar'

Mortalical::Calendar.generate(ARGV[0].to_i, !ARGV.include?("--letter"), !ARGV.include?("--nofill"))```
assistant