A hug. A high-five. A gentle dropping of your shield. There are many different ways we greet each other, both verbally and physically, but I tend to prefer the simplest salutation. Not only is it short and sweet, but it also possesses my most favorite word characteristic ever—it consists solely of adjacent letters in the alphabet. There are very few such two-letter words, but the ones that exist are amongst the most used in my pint-sized vocabulary. My preferred welcome is one (Hi!), my response to almost every question is another (No!), and the third is an acronym we’ll get to soon. I would give you a hint, but my Magic 8 Ball said I should not, under any circumstance, tell you it starts with “T” and ends with “U”. So, we’ll move on for now, with a promise that I’ll update you later. Deal?