pulled in lisp koans for solving

https://github.com/google/lisp-koans

lisp-koans/koans/extra-credit.txt

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+= Playing Greed
+
+Greed is a dice game played among 2 or more players, using 5
+six-sided dice.
+
+== Playing Greed
+
+Each player takes a turn consisting of one or more rolls of the dice.
+On the first roll of the game, a player rolls all five dice which are
+scored according to the following:
+
+  Three 1's => 1000 points
+  Three 6's =>  600 points
+  Three 5's =>  500 points
+  Three 4's =>  400 points
+  Three 3's =>  300 points
+  Three 2's =>  200 points
+  One   1   =>  100 points
+  One   5   =>   50 points
+
+A single die can only be counted once in each roll.  For example,
+a "5" can only count as part of a triplet (contributing to the 500
+points) or as a single 50 points, but not both in the same roll.
+
+Example Scoring
+
+   Throw       Score
+   ---------   ------------------
+   5 1 3 4 1   50 + 2 * 100 = 250
+   1 1 1 3 1   1000 + 100 = 1100
+   2 4 4 5 4   400 + 50 = 450
+
+The dice not contributing to the score are called the non-scoring
+dice.  "3" and "4" are non-scoring dice in the first example.  "3" is
+a non-scoring die in the second, and "2" is a non-score die in the
+final example.
+
+After a player rolls and the score is calculated, the scoring dice are
+removed and the player has the option of rolling again using only the
+non-scoring dice. If all of the thrown dice are scoring, then the
+player may roll all 5 dice in the next roll.
+
+The player may continue to roll as long as each roll scores points. If
+a roll has zero points, then the player loses not only their turn, but
+also accumulated score for that turn. If a player decides to stop
+rolling before rolling a zero-point roll, then the accumulated points
+for the turn is added to his total score.
+
+== Getting "In The Game"
+
+Before a player is allowed to accumulate points, they must get at
+least 300 points in a single turn. Once they have achieved 300 points
+in a single turn, the points earned in that turn and each following
+turn will be counted toward their total score.
+
+== End Game
+
+Once a player reaches 3000 (or more) points, the game enters the final
+round where each of the other players gets one more turn. The winner
+is the player with the highest score after the final round.
+
+== References
+
+Greed is described on Wikipedia at
+http://en.wikipedia.org/wiki/Greed_(dice_game), however the rules are
+a bit different from the rules given here.