[Landline]

This is based off the time-honored decoding board game, Mastermind .

I'm thinking of a 4-digit number (zero is a digit).  You have 8 chances to guess it.

For each guess, I will return the following information:

! = number is correct in the right place
. = number is correct, but in the wrong place.

For example, say the number was 1234.  Say your guess was 1432.  That means your response would be "!!..", or 2 digits in the right place, 2 correct digits in the wrong place.  (this information is not placeholder specific).  

If there are duplicate numbers in the guess (1111), they cannot all be awarded a marker unless they correspond to the same number of duplicates.  In this case: "!" would be the response (one digit in the right place).

This is a helpful strategy to at least find out what the right numbers are.  But remember, you only have 8 chances, so if you try 1111, 2222, 3333, etc., you will run out of chances before you try all the digits.

The winner will be able to select the new 4-digit number to guess, and the game continues.

So...  Anybody dare to make the first guess?