Digit Guess 1A2B, also called "Bulls and Cows", is an addition game. Wikipedia description is available at https://en.wikipedia.org/wiki/Bulls_and_Cows . It is an old-breaking paper and pencil game, now with voice version for Amazon Echo. Alexa generates a random 3-digit secret number. The digits are all different. You try to guess the number, and Alexa gives the matches. If the matching digits are in their right positions, they are "A", if in different positions, they are "B".
Example: Secret number: 638 Your try: 836 Answer: 1 A and 2 B. (The A is "3", the B are "6" and "8".)
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