Unlike virtually every computer system in the world which uses a variant of ASCII, IBM mainframes and midrange systems such as the AS/400 tend to use a wholly incompatible character set primarily designed for ease of use on punched cards. (For an excellent page on punched cards, see Doug Jones's Punched Card Codes).
There are a few Keurig K-cups that DO contain calories. They fall under two categories. Brew Over Ice teas and coffees (except Twinings) and Cafe Escapes. Keurig has kept those around 60 calories each. When in doubt consider the consistency of the coffee. If it is creamy- it contains calories and most likely sugar. If it is a simple black coffee, calories are not an issue.
Example: If you are a 45 year old women, 5'4 and weigh 140 pounds your BMR is 1200 calories. Your breakfast would be 240-300 calories. Another approximate example: A quarter to a third of your calories should be consumed at breakfast. This translates to: 400-533 calories for a sedentary woman over 50 on 1600 calories.